Achilles tendinopathy usually develops gradually. An Achilles rupture is an acute tear that often happens suddenly and causes a marked loss of normal push-off strength.
How does Achilles tendinopathy usually start?
Tendinopathy often begins as stiffness or pain at the back of the heel or lower calf, commonly after a change in activity or training load.
How does an Achilles rupture usually happen?
A rupture often occurs suddenly during a forceful push-off, sprint, jump, lunge, slip or other rapid loading event.
NHS rupture guidance commonly describes a sudden pain in the heel or calf, sometimes with a snapping or popping sound and a feeling as though someone has kicked the back of the leg.
Quick comparison
| Feature | Tendinopathy | Rupture |
|---|---|---|
| Onset | Usually gradual | Usually sudden |
| Typical sensation | Aching, stiffness, load-related pain | Sharp pain, snap/pop, sudden weakness |
| Walking | Often possible, though painful | Often difficult with poor push-off |
| Tiptoe | May be painful or weak | May be impossible on the injured side |
| Management | Progressive rehabilitation and load management | Prompt assessment and structured rupture treatment |
Can a rupture stop hurting quickly?
Yes. NHS rupture information notes that the initial sharp pain may settle into a dull ache or even reduce substantially. A reduction in pain does not rule out a rupture if push-off strength and function have suddenly changed.
Seek prompt assessment after sudden Achilles pain if you heard or felt a snap/pop, cannot walk normally, cannot push off properly, cannot stand on tiptoe, or have significant calf/ankle swelling and bruising.
Should you put a heel lift in your shoe if you think it has ruptured?
No. A suspected rupture should be assessed. Rupture treatment can involve a cast or walking boot with the ankle held in a protected position, and the rehabilitation pathway is very different from self-managing tendinopathy.
Why does the distinction matter?
Tendinopathy is commonly managed with progressive strengthening and activity modification. A rupture requires the tendon to be protected while it heals and follows a specific clinical rehabilitation pathway.
Managing Gradual Achilles Tendon Pain?
Explore heel lifts and Achilles supports intended for everyday conservative support, not for self-treatment of suspected rupture.
Explore Achilles Supports
