When Does Foot Drop Need Surgery?

Most cases of foot drop do not automatically require surgery.

An operation may be considered when:

• A nerve remains physically compressed
• A nerve has been badly damaged or divided
• Scar tissue is preventing normal nerve movement
• A slipped disc or another spinal problem is compressing a nerve root
• Weakness is progressing
• A structural lesion such as a cyst or mass is pressing on a nerve
• Useful movement has not returned after an appropriate recovery period
• Permanent muscle imbalance makes the foot unstable
• The foot or ankle has developed a fixed deformity
• An AFO no longer provides acceptable function
• A surgically correctable problem is significantly affecting mobility or quality of life

There is no single operation called “foot-drop surgery”.

The correct procedure depends on where the problem is located and what the surgeon is trying to achieve.

Possible procedures include:

• Peripheral nerve exploration
• Nerve decompression or neurolysis
• Nerve repair
• Nerve grafting
• Spinal decompression
• Discectomy
• Tendon transfer
• Correction of foot deformity
• Fusion of selected foot or ankle joints

The NHS lists surgery to repair or graft a nerve or fuse foot and ankle joints among the potential treatments for permanent loss of movement from foot drop.

Is Surgery Common for Foot Drop?

No.

Many people are initially managed with:

• Treatment of the underlying condition
• Physiotherapy
• An ankle-foot orthosis
• Suitable footwear
• A walking aid
• Functional electrical stimulation where appropriate
• Monitoring of nerve recovery
• Falls-prevention measures

Some foot-drop causes improve without surgery.

For example:

• Mild nerve compression may recover after pressure is removed
• A slipped disc may improve with time and conservative treatment
• Stroke-related movement may improve through rehabilitation
• Symptoms following an MS relapse may partially or fully settle
• An AFO may provide adequate long-term function where weakness remains

Surgery is more likely to be discussed when there is a clear structural problem, significant continuing disability or limited prospect of satisfactory recovery through non-operative treatment alone. General NHS foot-and-ankle guidance also emphasises that surgery is normally considered after other appropriate interventions have been tried and when the potential functional benefit outweighs the risks.

Does Severe Foot Drop Automatically Need Surgery?

No.

The visible severity of the foot drop is only one consideration.

Complete loss of ankle lifting may result from:

• A temporary conduction block
• A severe peripheral nerve injury
• A spinal nerve-root problem
• Stroke
• Multiple sclerosis
• Peripheral neuropathy
• Muscle disease

These causes have different treatments.

A person may have severe weakness but a reasonable chance of spontaneous nerve recovery.

Another person may have milder but progressively worsening weakness caused by ongoing compression that requires prompt specialist review.

The decision is based on:

• Diagnosis
• Progression
• Examination
• Nerve tests
• Imaging
• Duration
• Functional effect
• Recovery potential
• Risks of waiting
• Risks and likely benefits of the proposed operation

When Is Surgery Urgent?

Surgery can be urgent when nerves are being compressed in a way that risks permanent damage or when weakness follows a serious injury.

Examples may include:

• Cauda equina syndrome
• Major spinal compression
• Rapidly progressing weakness with a surgically treatable spinal cause
• Severe traumatic nerve injury
• A nerve being compressed by postoperative bleeding or another acute problem
• An injury involving blood vessels as well as nerves
• An open injury in which a nerve may have been divided

The exact urgency must be decided by the relevant spinal, orthopaedic, neurological or peripheral-nerve team.

New foot drop is treated as an urgent referral in some NHS spinal pathways, particularly where it is progressive or associated with significant leg pain and abnormal strength or sensation.

When Is Foot Drop a Spinal Emergency?

Foot drop with back pain does not always mean an emergency.

Emergency assessment is required when it is accompanied by warning signs of severe lower-spinal nerve compression, including:

• Numbness between the legs
• Numbness around the genitals or back passage
• Altered sensation when wiping after using the toilet
• Difficulty starting urination
• Inability to urinate
• Loss of awareness that the bladder is full
• Urinary leakage without awareness
• Loss of bowel control
• New sexual dysfunction
• Rapidly worsening weakness in both legs

These can be symptoms of cauda equina syndrome. NHS guidance treats cauda equina as an emergency because delayed treatment can lead to lasting bladder, bowel, sexual or lower-limb dysfunction.

Do not wait for every symptom to develop.

Can a Slipped Disc Need Surgery?

Yes, but most slipped discs do not require an operation.

A slipped or herniated disc may compress a spinal nerve root and cause:

• Sciatica
• Numbness
• Tingling
• Weakness
• Foot drop

Lumbar decompression may be considered where:

• Significant nerve compression is identified
• Weakness is worsening
• Symptoms fail to improve with suitable non-operative treatment
• The functional loss is substantial
• Cauda equina syndrome is suspected or confirmed
• Imaging and examination identify a surgically treatable problem

The NHS states that lumbar decompression may be performed for a slipped disc, compressed sciatic nerve, spinal stenosis, spinal injury or cauda equina syndrome. Depending on the cause, part of a disc may be removed through a discectomy or bone may be removed to create more space around the nerve.

What Is a Discectomy?

A discectomy removes part of a spinal disc that is pressing on a nerve.

The aim is to:

• Relieve pressure
• Prevent continuing damage
• Allow the nerve the opportunity to recover
• Improve associated leg symptoms

It does not directly strengthen the foot during the operation.

Even after pressure is removed, the nerve may need weeks or months to recover.

Some people regain substantial ankle movement.

Others retain:

• Partial weakness
• Numbness
• Foot slap
• Long-term foot drop
• A need for an AFO

What Is Lumbar Decompression?

Lumbar decompression is a broader term for operations that create more space around compressed nerves in the lower spine.

It may include:

• Laminectomy
• Discectomy
• Removal of thickened tissue
• Other procedures suited to the specific compression

The NHS explains that a laminectomy removes small pieces of bone from a vertebra, while a discectomy removes part of an affected disc. The procedure is carried out under general anaesthetic and is selected according to the cause of compression.

Does Spinal Surgery Guarantee That Foot Drop Will Recover?

No.

Spinal surgery may successfully relieve compression without guaranteeing that the affected nerve will regain full function.

Recovery depends on:

• How severely the nerve was compressed
• How long the weakness existed
• Whether nerve fibres were damaged
• Whether muscle wasting has developed
• Age and general health
• The underlying spinal condition
• Rehabilitation
• Whether another nerve problem is also present

Pain may improve before strength.

A reduction in sciatica does not necessarily mean that ankle control has fully recovered.

Can Surgery Make Foot Drop Worse?

All surgery carries risks.

Potential spinal-surgery complications include:

• Infection
• Bleeding
• Spinal-fluid leakage
• Continued pain
• Further nerve injury
• New or worsened weakness
• Need for further surgery
• Anaesthetic complications

Serious complications of lumbar decompression are uncommon, but the NHS lists nerve damage, paralysis, persistent back pain and movement of spinal bones among the potential risks that should be discussed before surgery.

The expected benefit must therefore be balanced against:

• The severity of the current problem
• The chance of recovery without surgery
• The risks of leaving compression untreated
• The person’s overall health

Can a Trapped Peroneal Nerve Need Surgery?

Yes.

The common peroneal nerve passes close to the surface around the outside of the knee and may be compressed by:

• Scar tissue
• Injury
• Knee dislocation
• Fracture
• Surgery
• A cyst or mass
• Prolonged external pressure
• Structural narrowing around the nerve

Some peroneal nerve injuries recover without surgery.

Surgery may be discussed when:

• Compression is continuing
• Recovery is not occurring as expected
• Pain is significant
• Nerve testing indicates substantial injury
• Scar tissue may be restricting the nerve
• The nerve may have been divided
• The diagnosis or extent of injury remains uncertain
• A removable structure is pressing on the nerve

RNOH confirms that some common peroneal nerve injuries recover with time, while others may require surgical exploration depending on the injury and its timing.

What Is Peroneal Nerve Exploration?

During nerve exploration, the surgeon identifies the common peroneal nerve and its branches around the knee.

The procedure may allow the surgeon to:

• Examine the nerve directly
• Identify scar tissue
• Assess the extent of damage
• Release external compression
• Improve understanding of the likely recovery
• Repair or graft the nerve where appropriate

RNOH explains that common peroneal nerve exploration is performed under general anaesthetic. The surgeon carefully locates the nerve and its branches through an incision around the back or outside of the knee.

What Is Nerve Decompression?

Nerve decompression aims to remove or release tissue that is pressing on the nerve.

This may involve:

• Releasing a tight anatomical tunnel
• Removing constricting scar tissue
• Releasing tissue around the fibular head
• Addressing a cyst or another compressive structure
• Removing pressure created by a previous injury

The goal is to create enough space for the nerve and prevent continuing compression.

Decompression does not instantly restore muscle movement.

The nerve may still need time to recover after pressure is removed.

What Is Neurolysis?

Neurolysis is the surgical release of scar tissue or adhesions around a nerve.

Scar tissue can restrict the nerve and interfere with its normal movement or function.

RNOH describes neurolysis as releasing scar tissue surrounding the common peroneal nerve during surgical exploration.

Neurolysis may be one part of an operation rather than the entire procedure.

What Is Nerve Repair?

Direct nerve repair may be considered when a nerve has been cleanly divided and its ends can be brought together without excessive tension.

The surgeon attempts to reconnect the nerve pathway so that fibres can regrow towards the muscles and sensory areas they originally supplied.

Recovery is not immediate.

Nerve fibres must still regenerate through the repaired area and along the leg.

The final result may include:

• Good recovery
• Partial recovery
• Sensory improvement without full movement
• Persistent weakness

What Is a Nerve Graft?

A nerve graft bridges a gap where the damaged nerve ends cannot be joined directly.

A section of another nerve may be used to provide a pathway through which regenerating fibres can grow.

RNOH confirms that nerve grafting may be required when common peroneal nerve damage is more serious, depending on the extent and timing of the injury.

A graft does not guarantee that every nerve fibre will reach the correct muscle.

How Long Does Nerve Surgery Take to Work?

The surgical wound may heal within weeks, but nerve recovery can take much longer.

RNOH states that recovery following common peroneal nerve injury is highly variable. Improvement may not be visible for many months, and final foot function can sometimes take up to two years to become clear.

The person may continue using an AFO during this period.

What Are the Risks of Peroneal Nerve Surgery?

Possible risks include:

• Pain
• Infection
• Bleeding
• Haematoma
• Blood-vessel injury
• Further nerve damage
• Altered sensation
• Persistent weakness
• Scar pain
• Blood clots
• Anaesthetic complications
• Failure to improve

RNOH explains that the precise risk depends on the injury and the person’s wider medical history.

Does Every Peroneal Nerve Palsy Need Decompression?

No.

Some injuries recover spontaneously.

Surgery is selected according to:

• Cause
• Severity
• Duration
• Clinical progression
• Imaging
• Nerve-conduction results
• Whether compression remains
• Whether nerve fibres are regenerating
• The functional impact

Someone should not arrange elective nerve surgery solely because foot drop has lasted a particular number of weeks.

Can a Cyst Cause Foot Drop?

A cyst or another structure near the nerve may compress it and cause:

• Weakness
• Numbness
• Pain
• Foot drop

If imaging identifies a discrete structure pressing on the nerve, surgery may be considered to remove or address that cause.

The surgical plan depends on:

• The nature of the structure
• Its location
• Relationship to the nerve
• Risk of recurrence
• Degree of nerve damage

Can a Tumour Cause Foot Drop?

A nerve-sheath tumour or another mass can occasionally compress or involve a nerve.

Treatment may involve:

• Monitoring
• Imaging
• Biopsy
• Removal
• Specialist nerve surgery

The decision is made through a specialist multidisciplinary service.

A lump near the knee with progressive nerve symptoms should be medically assessed rather than treated only with an AFO.

When Is Tendon Transfer Considered?

Tendon transfer may be considered when:

• Foot drop is long-standing
• Useful nerve recovery is unlikely
• A suitable working muscle and tendon remain available
• The foot is sufficiently flexible
• The person wants more active or stable foot positioning
• Long-term AFO use is difficult or insufficient
• The expected benefit justifies surgery and rehabilitation

RNOH notes that tendon transfer may be discussed as a further operation following common peroneal nerve injury.

What Is a Tendon Transfer?

A tendon joins a muscle to a bone.

During tendon-transfer surgery, a functioning tendon is detached from its original attachment and rerouted to perform a different movement.

For foot drop, the aim may be to use a functioning muscle to:

• Help lift the foot
• Improve balance between muscle groups
• Hold the foot in a more useful position
• Reduce uncontrolled downward movement
• Improve walking without relying entirely on a brace

The operation does not repair the original damaged nerve.

It changes which functioning muscle produces the desired foot movement.

Does Tendon Transfer Restore Normal Ankle Movement?

Not necessarily.

A transferred tendon may create useful active movement, but the result may differ from a normally functioning ankle.

The person may need to learn:

• How to activate the transferred muscle
• How to control the new movement
• How to walk with the changed mechanics

Postoperative physiotherapy is therefore important.

Some people may still use:

• An AFO
• Footwear modifications
• A walking aid

during part of their recovery or for particular activities.

Who May Not Be Suitable for Tendon Transfer?

Suitability depends on specialist assessment.

Potential limitations may include:

• No suitable functioning donor muscle
• A rigid or severely deformed foot
• Significant joint arthritis
• Poor circulation
• Active infection
• Uncontrolled swelling
• High anaesthetic risk
• Progressive neurological weakness
• Inability to follow postoperative restrictions
• Skin or wound-healing concerns

A tendon transfer is not simply offered because the foot drop has become permanent.

Can Tendon Transfer Be Used After Stroke or MS?

Central neurological conditions require particularly careful assessment.

A tendon transfer does not treat:

• Spasticity
• Poor coordination
• Changing muscle tone
• Reduced sensation
• Wider hip or knee weakness
• Progressive neurological disease

A person with a central neurological cause may sometimes require surgery for secondary deformity, contracture or muscle imbalance, but this is not the routine treatment for ordinary stroke- or MS-related foot drop.

AFOs, rehabilitation, spasticity management and FES are more commonly considered first.

Can Diabetic Foot Drop Need Surgery?

Sometimes.

Surgery may be considered where diabetes coexists with a clearly identified focal problem such as:

• Peroneal nerve entrapment
• A spinal nerve-root compression
• Severe deformity
• Joint instability
• A structural lesion

Generalised diabetic peripheral neuropathy cannot usually be corrected through one simple nerve operation.

Diabetes also affects surgical planning because it can increase concerns involving:

• Wound healing
• Infection
• Skin
• Sensation
• Circulation
• Blood-glucose control

The surgical and diabetes teams may need to work together before and after an operation.

When Is Fusion Considered?

Fusion may be considered in selected permanent cases where the foot or ankle is:

• Painful
• Severely unstable
• Deformed
• Fixed in a poor position
• Unable to be controlled satisfactorily with an AFO
• Affected by significant joint damage

The NHS foot-drop guidance identifies fusion of ankle and foot joints as one possible operation for permanent loss of movement.

Fusion is not normally the first surgical choice for flexible, uncomplicated foot drop.

What Is Ankle Fusion?

Ankle fusion permanently joins the bones forming the ankle joint.

The damaged joint surfaces are removed and the bones are fixed together while they heal into one solid unit.

The aim is usually to create:

• Stability
• A more useful position
• Reduced pain
• A dependable surface for weight-bearing

The trade-off is permanent loss of movement through the fused joint.

Royal Orthopaedic Hospital guidance explains that an ankle fusion stiffens the joint using internal fixation and requires a prolonged period in a cast or brace while the bones unite.

Does Fusion Make the Ankle Completely Rigid?

The fused joint no longer moves normally.

Some movement may still come from neighbouring joints in the foot.

The effect on walking depends on:

• Which joint or joints are fused
• The position of fusion
• Footwear
• Other joint mobility
• Strength
• Balance
• The condition of the opposite leg

Fusion is therefore a major and generally irreversible decision.

How Long Is Recovery After Fusion?

Recovery varies by procedure.

Royal Orthopaedic Hospital guidance states that an ankle fusion may require a plaster or brace for approximately three to four months while the joint heals. Weight-bearing is introduced according to surgical review and X-ray findings.

Broader foot-and-ankle surgery guidance warns that recovery can continue for many months and may take around a year before the foot begins to feel more normal.

Do not apply one fusion recovery schedule to every foot-drop operation.

Does Surgery Remove the Need for an AFO?

Not always.

After successful surgery, a person may:

• Stop using an AFO
• Use a lighter AFO
• Use one only for longer walks
• Use one during postoperative rehabilitation
• Continue requiring long-term orthotic support

The outcome depends on:

• Procedure
• Nerve recovery
• Tendon function
• Joint position
• Knee control
• Balance
• Wider neurological condition

The aim of surgery should be discussed clearly before the operation.

Can an AFO Be Used While Waiting for Surgery?

Yes, when it has been professionally selected and remains safe.

An AFO may help:

• Improve toe clearance
• Reduce foot slap
• Stabilise the ankle
• Reduce compensatory high stepping
• Support work or daily activity
• Reduce some trip risk
• Maintain mobility while investigations continue

Using an AFO does not prevent a surgeon assessing the underlying nerve or spinal problem.

Bring the brace and usual footwear to surgical appointments so the team can understand what is and is not working.

Can an AFO Be Used Immediately After Surgery?

Only when the surgical team specifically approves it.

Immediately after surgery, the leg may have:

• A dressing
• Swelling
• A wound
• A plaster cast
• A removable boot
• Weight-bearing restrictions
• New pressure-sensitive areas

A pre-operative AFO may no longer fit safely.

Do not place a normal foot-drop brace:

• Over a fresh incision
• Beneath an unauthorised cast
• Over substantial swelling
• Inside footwear that compresses the wound
• Around a newly operated nerve

Follow the postoperative instructions provided by the surgical team.

When Can an AFO Be Reintroduced?

Timing depends on:

• The operation
• Wound healing
• Swelling
• Weight-bearing status
• Skin
• Cast or boot removal
• Ankle position
• Physiotherapy plan

A new AFO may be required if surgery changes:

• The leg shape
• Ankle angle
• Foot position
• Calf circumference
• Required stiffness
• Footwear

Do not assume that the previous brace remains suitable.

Carbon AFO for Longer-Term Support

The Carbon Ankle Foot Orthosis, SKU CAFO, is a lightweight structured AFO for suitable presentations of moderate or flaccid foot drop.

Its current features include:

• Pre-loaded carbon-fibre construction
• Dorsiflexion assistance
• Plantarflexion limitation
• Energy storage and return
• Spiral carbon design
• Medial strut
• Built-in arch support
• Mild mediolateral control
• Hook-and-loop calf closure with padding
• Small, Medium and Large sizes
• Separate left- and right-foot versions
• Trimmable fitting areas
• 100kg stated device weight limit
• Latex-free construction

Its listed indications include postoperative and post-trauma use, moderate foot drop, flaccid foot drop, swing-phase dorsiflexion weakness and mild knee hyperextension or tonal plantarflexion in suitable cases.

When Might the Carbon AFO Be Appropriate?

It may suit someone who:

• Has a flexible ankle
• Has moderate or flaccid foot drop
• Fits the available sizing
• Requires more structure than a textile brace
• Has only mild side-to-side instability
• Can use appropriate footwear
• Falls within the stated device limit
• Has been cleared for its use following surgery or trauma

It may be unsuitable where:

• The ankle is fixed
• Spasticity is substantial
• The foot turns strongly
• The knee is significantly unstable
• Skin or sensation creates a high pressure risk
• The standard shape does not fit
• The surgical wound has not healed
• The surgeon has prescribed a different postoperative support

Can an AFO Replace Surgery?

Sometimes an AFO provides enough function that surgery is unnecessary or can reasonably be deferred.

This may be the case when the person:

• Walks safely and comfortably
• Has acceptable toe clearance
• Can tolerate the brace throughout required activities
• Has no ongoing harmful nerve compression
• Does not have progressive neurological loss
• Is not suitable for surgery
• Prefers non-operative management after discussing the options

An AFO cannot replace emergency treatment for:

• Cauda equina syndrome
• Progressive spinal compression
• A divided nerve
• Major traumatic injury
• A significant compressive mass

How Is the Decision About Surgery Made?

The process may involve:

• GP assessment
• Neurological examination
• Physiotherapy
• Orthotic review
• Spinal or orthopaedic assessment
• Peripheral-nerve specialist review
• Nerve-conduction studies
• Electromyography
• MRI
• Ultrasound
• X-rays
• Gait assessment
• Review of previous recovery

The team will consider:

• Diagnosis
• Duration
• Severity
• Whether weakness is stable or worsening
• Remaining muscle power
• Sensation
• Joint flexibility
• Foot alignment
• Skin and circulation
• Functional goals
• Ability to participate in rehabilitation

Why Are Nerve-Conduction Studies Used?

Nerve-conduction studies measure how electrical signals travel through a nerve.

They may help identify:

• Where the nerve is affected
• Whether signals pass through the injured area
• Whether nerve fibres have degenerated
• The severity of the injury
• Signs of recovery
• Whether the problem is peripheral or more widespread

RNOH includes nerve-conduction studies among the investigations used when assessing common peroneal nerve injuries.

What Is Electromyography?

Electromyography assesses electrical activity within muscles.

It may help identify:

• Whether the muscle receives nerve signals
• Evidence of denervation
• Evidence that nerve fibres are reconnecting
• Which muscles are affected
• Whether the pattern fits a nerve or nerve-root injury

The result does not provide a guaranteed date of recovery but can help guide monitoring and surgical discussions.

Why Is MRI Used?

MRI may identify:

• A slipped disc
• Spinal stenosis
• A nerve-root compression
• Scar tissue
• A cyst
• A soft-tissue mass
• Changes around the nerve or spine

The finding must match the:

• Side of weakness
• Affected muscles
• Sensory symptoms
• Clinical examination

A disc bulge visible on MRI may not be responsible for the foot drop if the pattern does not match.

Is Ultrasound Used?

Ultrasound can help examine a superficial peripheral nerve and nearby tissues.

It may show:

• Swelling
• Compression
• A cyst
• Changes in nerve shape
• Scar tissue
• Movement of the nerve

The test selected depends on the suspected cause and local specialist pathway.

How Long Do Doctors Wait Before Surgery?

There is no universal waiting period.

The appropriate timing depends on whether the problem is:

• An emergency compression
• An acute traumatic nerve injury
• A recoverable conduction block
• A degenerative nerve injury
• A chronic entrapment
• A slipped disc
• Permanent muscle imbalance
• Progressive neurological disease

Waiting may be reasonable when:

• Recovery remains likely
• Strength is stable or improving
• Nerve tests show regeneration
• An AFO provides safe function
• There is no continuing harmful compression

Waiting may be inappropriate when:

• Weakness is rapidly worsening
• Emergency spinal symptoms are present
• A nerve has been divided
• A structural lesion is continuing to compress the nerve
• The delay could reduce the chance of recovery

Does Foot Drop Have To Be Permanent Before Surgery?

No.

Urgent or early surgery may be needed for an active compressive or traumatic cause before the weakness becomes permanent.

Operations such as tendon transfer or fusion are more commonly considered when recovery is limited or unlikely.

The reason for surgery therefore determines its timing.

What Does “Failed Conservative Treatment” Mean?

It generally means that appropriate non-surgical measures have not provided an acceptable result.

These may include:

• Physiotherapy
• AFO use
• Walking aids
• Footwear changes
• Activity modification
• Treatment of spasticity
• Monitoring nerve recovery
• Management of the underlying condition

It does not mean that someone must try every product available before receiving a surgical opinion.

Where a serious structural problem exists, referral may be appropriate much earlier.

Can Someone Request a Surgical Opinion?

Yes.

A specialist opinion may be appropriate where:

• The diagnosis is uncertain
• Foot drop is persistent
• Weakness is worsening
• Nerve recovery has plateaued
• An AFO cannot be tolerated
• AFOs repeatedly fail
• The foot has become deformed
• Pain or numbness is significant
• Tests show a treatable compression
• The person wants to understand long-term options

Receiving an opinion does not commit someone to having surgery.

What Questions Should You Ask the Surgeon?

Useful questions include:

• What is causing my foot drop?
• Where is the nerve problem located?
• Is the weakness still likely to recover without surgery?
• What operation are you recommending?
• What is the goal of the operation?
• Is the aim nerve recovery, pain relief, stability or improved foot position?
• What happens if I do not have surgery?
• What are the main risks?
• How likely is useful movement to return?
• Will I still need an AFO?
• How long will I be non-weight-bearing?
• Will I need a cast or walking boot?
• When can physiotherapy begin?
• When might I return to work?
• When can I drive?
• How long could the full recovery take?
• Are there suitable alternatives?

What Should You Take to the Appointment?

Take:

• Your current AFO
• Previous braces
• Everyday footwear
• Walking aid
• Medication list
• Relevant scan reports
• Nerve-test reports
• Surgical letters
• Details of previous operations
• A record of falls
• Photographs of skin pressure
• Notes about changes in strength
• Details of work and daily activities

This helps the surgeon understand the functional effect rather than only the examination performed in clinic.

What Are the General Risks of Surgery?

Risks differ between operations but may include:

• Infection
• Bleeding
• Blood clots
• Anaesthetic complications
• Wound-healing problems
• Scarring
• Continued pain
• Numbness
• Further nerve damage
• Failure to improve
• Need for another operation
• Loss of joint movement
• Problems with metalwork
• Failure of bones to fuse
• Difficulty returning to previous activities

The person’s individual risks may be influenced by:

• Diabetes
• Smoking
• Circulation
• Weight
• Skin health
• Medication
• Other medical conditions

Does Smoking Affect Foot-Drop Surgery?

Smoking can impair:

• Wound healing
• Bone healing
• Circulation
• Recovery from anaesthesia

RNOH advises that smoking increases risks involving the lungs, circulation and wound healing and recommends stopping before peripheral nerve surgery.

Foot-and-ankle surgery guidance similarly advises stopping smoking because successful bone healing may be affected.

Does Diabetes Affect Surgery?

Diabetes can influence:

• Wound healing
• Infection risk
• Sensation
• Circulation
• Swelling
• Skin monitoring

Blood-glucose management may need closer coordination before and after the operation.

Report:

• Previous ulcers
• Neuropathy
• Circulation problems
• Current wounds
• Previous infections

to the surgical team.

Will Physiotherapy Be Needed After Surgery?

Often.

Postoperative physiotherapy may help with:

• Transfers
• Crutch or frame use
• Weight-bearing progression
• Joint movement
• Muscle activation
• Tendon retraining
• Balance
• Gait
• Stairs
• Return to daily activity

The NHS states that physiotherapy may be arranged after lumbar decompression to assist movement and rehabilitation.

The precise programme depends on the procedure and surgeon’s restrictions.

Should You Exercise the Foot Immediately After Surgery?

Only according to the surgical and physiotherapy instructions.

Some procedures require:

• Immobilisation
• Protection of a repair
• Limited ankle movement
• Non-weight-bearing
• A cast or boot

Starting unsupervised ankle exercises too early could:

• Stress a nerve repair
• Pull on a transferred tendon
• Disrupt bone healing
• Increase swelling
• Damage the wound

Previous home exercises may need to be paused or changed.

Will You Be Non-Weight-Bearing?

Possibly.

The restrictions depend on the operation.

A nerve exploration may have different requirements from:

• Tendon transfer
• Ankle fusion
• Spinal decompression
• Foot reconstruction

Foot-and-ankle procedures can require crutches, a frame, plaster or a boot and a period during which no weight or only limited weight is placed through the operated limb.

How Should You Prepare Your Home?

Before an operation, consider:

• Clearing loose rugs and cables
• Planning how to use stairs
• Arranging help with meals and shopping
• Moving essential items within reach
• Preparing a place to elevate the leg
• Practising with crutches where advised
• Arranging transport
• Considering bathroom access
• Keeping children and pets away from walking aids

Royal Orthopaedic Hospital guidance recommends planning household help, stair access, mobility-aid use and removal of obstacles before foot-and-ankle surgery.

When Can You Return to Work?

This depends on:

• Procedure
• Wound healing
• Weight-bearing
• Mobility
• Job demands
• Driving
• Pain
• Fatigue

Someone doing desk work may return earlier than someone whose job involves:

• Long periods standing
• Heavy lifting
• Ladders
• Uneven ground
• Driving
• Safety footwear

The NHS indicates that return to work after lumbar decompression may be possible at around four to six weeks for some people, with full normal activity taking longer. This should not be applied to nerve grafts, tendon transfers or fusion procedures.

When Can You Drive?

Do not drive until:

• The surgical team permits it
• You are no longer affected by sedating medication
• You can enter and exit the vehicle safely
• You can control the pedals reliably
• You can perform an emergency stop
• A cast, boot or AFO does not obstruct control
• Your insurer’s requirements are met

Foot drop can affect the speed and force needed for emergency braking, particularly when the right foot is affected.

A specialist driving assessment may be required.

What Warning Signs Should Be Reported After Surgery?

Contact the surgical team or NHS 111 for:

• Increasing wound redness or heat
• Discharge
• Fever
• Worsening pain
• New or increasing leg weakness
• New numbness
• Increasing swelling
• A cast or boot becoming too tight
• A cold or discoloured foot
• New difficulty controlling the bladder or bowel

The NHS specifically advises urgent contact after lumbar decompression for new leg pain, weakness or numbness, bladder or bowel-control problems or signs of wound infection.

When Should You Call 999 After Surgery?

Call 999 for:

• Sudden facial drooping, arm weakness or speech difficulty
• Severe breathing difficulty
• Chest pain
• Collapse
• Signs of a severe allergic reaction
• A suspected pulmonary embolism with sudden breathlessness or chest pain

Follow the operation-specific emergency advice supplied by the hospital.

Can Foot Drop Return After Surgery?

Yes.

Possible reasons include:

• Incomplete nerve recovery
• Recurrent compression
• Scar tissue
• Another slipped disc
• Progression of an underlying condition
• Failure of a tendon reconstruction
• Changes elsewhere in the leg
• New neurological disease

New or worsening weakness after previous improvement should be reassessed.

Do not simply increase AFO tension or assume the operation has permanently failed.

Can Surgery Cure Foot Drop?

Sometimes surgery can significantly improve the underlying problem, but “cure” is not guaranteed.

The possible outcomes include:

• Full return of useful movement
• Partial return
• Better sensation
• Less pain
• Improved foot position
• Better stability
• Reduced dependence on an AFO
• No meaningful improvement
• Further treatment being required

The goal should be clearly defined before surgery.

For one person, success may mean active foot lift.

For another, it may mean:

• A plantigrade foot
• Easier brace fitting
• Reduced pain
• Fewer trips
• Better long-term stability

Simple Foot-Drop Surgery Decision Guide

Surgery may not be needed when:

• The cause is expected to recover
• Strength is improving
• No continuing structural compression exists
• An AFO provides good function
• Physiotherapy is helping
• The risks outweigh the likely benefit
• The underlying condition is better managed non-operatively

A surgical opinion may be appropriate when:

• The cause is uncertain
• A nerve remains compressed
• Foot drop is worsening
• A nerve may have been divided
• A slipped disc is causing significant motor weakness
• Recovery has not occurred as expected
• Nerve tests show severe injury
• Pain or numbness is significant
• A structural lesion is present
• Permanent imbalance may benefit from tendon transfer
• A fixed deformity prevents safe walking or AFO use

Emergency assessment is required when:

• Weakness develops with bladder or bowel disturbance
• Saddle or genital numbness develops
• Both legs rapidly worsen
• Stroke symptoms occur
• Foot drop follows major trauma
• The foot becomes cold, pale or severely swollen
• Acute postoperative symptoms are progressing

Can You Continue Using an AFO Instead of Surgery?

Possibly, provided the underlying cause is not being harmed by delay.

Long-term non-operative management may include:

• A suitable AFO
• Physiotherapy
• Walking aids
• Footwear
• Falls prevention
• Skin monitoring
• Periodic orthotic review

Some people prefer an AFO because it provides adequate function without the recovery and risks of surgery.

Others find that:

• The brace cannot control the foot
• Pressure becomes difficult
• Required footwear is unacceptable
• Walking remains limited
• A surgically treatable cause is present

The decision should be made after understanding both pathways.

When Should the AFO Be Reviewed?

Arrange an orthotic review if:

• The foot-drop pattern changes
• Surgery is being planned
• Surgery has been completed
• The leg has changed shape
• Swelling develops
• Toe clearance remains poor
• The brace causes pressure
• The heel lifts
• The foot rotates
• Knee control changes
• The device cracks or wears
• Footwear no longer accommodates it

Do not modify an AFO yourself to fit around:

• A dressing
• Scar
• Swollen area
• Surgical boot
• Cast

Final Answer: When Does Foot Drop Need Surgery?

Foot drop may require surgery when there is an identifiable structural cause that can be corrected, when nerve damage is severe, when weakness is progressing or when permanent muscle imbalance or deformity cannot be managed adequately through rehabilitation and orthotic support.

The operation may target the:

• Peripheral nerve
• Spinal nerve root
• Tendon
• Foot
• Ankle joint

Most people should not choose surgery based solely on the severity or duration of the foot drop.

The decision requires:

• A clear diagnosis
• Appropriate investigations
• An understanding of likely natural recovery
• Consideration of an AFO and rehabilitation
• A realistic discussion of surgical goals
• An individual assessment of risks and benefits

Surgery may provide substantial functional improvement for a carefully selected person, but it cannot guarantee that normal ankle movement will return.