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What Should You Do If a Cast or Dressing Gets Wet?

A small splash and a soaked cast are not the same problem. This guide explains the first checks and when professional advice is needed.
What Should You Do If a Cast or Dressing Gets Wet?

Quick Answer

If a cast or dressing gets wet, first identify whether the moisture is only on the outside or has soaked through. Do not apply strong heat or insert towels underneath. Follow the instructions from the treating team and seek advice if the cast remains damp, softens, smells unusual or the dressing underneath may have become wet.

What should you check first?

Work out whether only the external surface was splashed or whether water has reached the padding or dressing underneath.

Can you use a hairdryer?

Avoid strong or hot airflow unless the treating team has specifically advised a safe method. Heat can injure skin and may affect cast materials.

Can you push a towel under the cast?

No. This can bunch the padding, damage the skin and alter pressure inside the cast.

What if the cast feels soft?

A softened or weakened cast may no longer provide the intended support and should be assessed.

What if there is a dressing underneath?

A wet wound dressing may need changing, particularly after surgery or where infection risk is a concern.

What warning signs should prompt review?

  • persistent dampness;
  • new odour;
  • increasing pain or burning;
  • discharge at an edge;
  • cast cracking or softening;
  • new swelling or numbness.

How can future wetting be reduced?

Use a correctly sized waterproof cover for showering and check the seal before each use.

Important: If you are unsure whether the inside of the cast or dressing is wet, contact the treating service rather than waiting for symptoms to develop.

Waterproof Arm Cast Cover

Waterproof Arm Cast Cover

The Waterproof Arm Cast Cover is a reusable, airtight protective solution designed to safeguard casts, bandages, and orthotic devices from water exposure during bathing or showering. Crafted from impermeable, flexible material, it ensures durability and comfort. Its anatomically designed shape, combined with...
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View Recommended Support

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When Should You Seek Professional Advice?

Contact the fracture clinic, surgical team or wound-care service if moisture has reached the padding or dressing, the cast becomes soft or damaged, or there are signs of wound leakage or infection.
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