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Blisters

Blisters are fluid-filled bumps under your skin that you can get if your skin is damaged.

Blisters are lumps under your skin that can be filled with clear fluid, blood or pus.

A blister will usually heal on its own if you cover it with a plaster or dressing and do not burst it. If it's very big or painful, a GP may drain it.

Read more on the NHS website.

Blisters are lumps under your skin that can be filled with clear fluid, blood or pus.

Check if you have a blister

A blister with clear fluid on the back of a footBlisters are small pockets of clear fluid under a layer of skin.

A red blister on the sole of a footBlood blisters are red or black and filled with blood instead of clear fluid.

An infected blister full of green and yellow pusIf the blister is infected it can be red, hot and filled with green or yellow pus.

Important

Don't ignore an infected blister. Without treatment it could lead to a skin or blood infection.

Read more on the NHS website.

A blister will usually heal on its own if you cover it with a plaster or dressing and do not burst it. If it's very big or painful, a GP may drain it.

Self-care

To relieve any pain, use an ice pack (or a bag of frozen vegetables wrapped in a towel) on the blister for up to 30 minutes.

To protect the blister and help prevent infection:


Do

  • cover blisters that are likely to burst with a soft plaster or dressing
  • wash your hands before touching a burst blister
  • allow the fluid in a burst blister to drain before covering it with a plaster or dressing

Don't

  • do not burst a blister yourself
  • do not peel the skin off a burst blister
  • do not pick at the edges of the remaining skin
  • do not wear the shoes or use the equipment that caused your blister until it heals

Medical treatments

Your GP might burst a large or painful blister using a sterilised needle. If your blister is infected, they may prescribe antibiotics.

They can also offer treatment and advice if blisters are caused by a medical condition.

Read more on the NHS website.