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Patient guide

Skin and stump problems, and what to do about them

Healthy skin is what lets you wear a leg all day, and most skin problems give early warning. This guide explains the common ones, what usually causes them, and when to stop wearing the leg and call.

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Reviewed by Ummad Shafique Mughal, Consultant Orthotist and Prosthetist. Updated October 2026.

In short

What are the common skin problems with an artificial leg?

The short answer

The common problems are red pressure marks, blisters, sweat rash, ingrown hairs and swelling at the end of the stump. Most come from a socket that no longer fits well, a worn liner, or heat and sweat.

Red marks should fade within twenty minutes of taking the leg off. Marks that stay, or any broken skin, mean you should stop wearing the leg and call us.

A hand mirror, towel, soap and skin cream beside a rolled prosthetic liner
A daily skin check takes two minutes

The daily skin check

Every evening, take the leg and liner off, wash and dry the stump, and look at all of it with a hand mirror, especially the back and the end. Feel for warm spots. If you have diabetes or reduced feeling, ask a family member to look too. Two minutes a day catches problems before they become sores.

Red marks and pressure spots

Some redness after wearing the leg is normal and should fade within about twenty minutes. A mark that stays longer, sits over a bone, or looks darker each day is a pressure spot: the socket is pressing too hard there, often because the stump has changed. Do not wait for it to break down; call us and we will relieve the socket.

A liner turned inside out drying with a towel on a shaded balcony chair
Dry the liner every day, out of direct sun

Blisters and rubbing

Blisters usually mean the stump is moving in the socket, or a sock or liner is wrinkled. Do not burst them. Rest the leg until the skin heals, keep the area clean and dry, and come in so we can find the cause: a loose socket, the wrong number of socks or a worn liner.

Sweat rash, ingrown hairs and boils

Heat and sweat inside a liner can cause rashes and infected hair follicles, which look like small red bumps or boils. Wash and dry the stump and the liner every day, dry the liner at midday in summer, and avoid shaving the stump, which tends to cause ingrown hairs. See a doctor for boils that grow or spread. Our guide to heat and sweat has a routine.

Swelling at the end of the stump

If the end of the stump does not touch the bottom of the socket, swelling can build up there, and the skin may become dark, thickened or weepy. It usually means the socket fit needs attention. Come in early; this is much easier to treat when it first appears.

When to see a doctor

  • An open sore that does not heal within a few days
  • Spreading redness, heat, swelling or pus
  • A fever with a painful stump
  • Any wound on the stump or the other foot if you have diabetes

See your doctor for infection, and call us so we can fix the cause in the socket.

Questions

Questions people ask

How long should red marks last?

They should fade within about twenty minutes of taking the leg off. Marks that stay longer mean the socket is pressing too hard and needs adjusting.

Should I burst a blister?

No. Rest the leg, keep the area clean and dry, and come in so we can find the cause.

Can I shave my stump?

It is usually better not to, because shaving tends to cause ingrown hairs and infected follicles under a liner.

When should I stop wearing the leg?

When the skin is broken, a sore is forming, or a mark stays for hours. Rest the leg and call us.

Related

Read next

Liners

Cushioning, washing and replacing.

Read more

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