Impetigo is a skin infection that's very contagious but not usually serious. It often gets better in 7 to 10 days if you get treatment. Anyone can get it, but it's very common in young children.

Check if you have impetigo

Impetigo starts with red sores or blisters, but the redness may be harder to see in brown and black skin.

The sores or blisters quickly burst and leave crusty, golden-brown patches.

The patches can:

  • look a bit like cornflakes stuck to your skin
  • get bigger
  • spread to other parts of your body
  • be itchy
  • sometimes be painful

Sores (non-bullous impetigo) or blisters (bullous impetigo) can start anywhere - but usually on exposed areas like your face and hands.

The sores or blisters burst and form crusty patches.

If you're not sure it's impetigo

Impetigo can look similar to other skin conditions.

  • blisters on lips or around the mouth could be cold sores
  • itchy, dry, cracked, sore could be eczema
  • itchy blisters could be shingles, chickenpox

See a GP if you or your child:

  • might have impetigo
  • had treatment for impetigo but the symptoms change or get worse
  • had impetigo before and it keeps coming back

Impetigo is very contagious. Check with the GP before you go in to the practice. They may suggest a phone consultation.

Treatment for impetigo from a GP

A GP will check it's not something more serious, like cellulitis.

If it's impetigo, they can prescribe antibiotic cream to speed up your recovery or antibiotic tablets if it's very bad.

If your impetigo keeps coming back

A GP can take a swab from around your nose to check for the bacteria that causes impetigo. They may also take a swab from inside your nose.

They might prescribe an antiseptic body wash, nasal ointment, or both, to try to clear the bacteria and stop the impetigo coming back.

Make sure you finish treatment

Do not stop taking the antibiotic tablets early, even if the impetigo starts to clear up.

Stop impetigo spreading or getting worse

Impetigo can easily spread to other parts of your body or to other people until it stops being contagious.

It stops being contagious:

  • 48 hours after you start using hydrogen peroxide cream or antibiotics prescribed by your GP
  • when the patches dry out and crust over - if you don't get treatment

You can do some things to help stop it spreading or getting worse while it's still contagious:


  • stay away from school or work
  • keep sores, blisters and crusty patches clean and dry
  • cover them with loose clothing or gauze bandages
  • wash your hands frequently
  • wash your flannels, sheets and towels at a high temperature
  • wash or wipe down toys with detergent and warm water if your children have impetigo


  • do not touch or scratch sores, blisters or crusty patches – this also helps stop scarring
  • do not have close contact with children or people with diabetes or a weakened immune system (if they're having chemotherapy, for example)
  • do not share flannels, sheets or towels
  • do not prepare food for other people
  • do not go to the gym
  • do not play contact sports like football

How to avoid impetigo

Impetigo usually infects skin that's already damaged.

To avoid spreading the infection to other areas of your body and to other people:

  • keeping cuts, scratches and insect bites clean - for example, by washing with warm water and soap
  • getting treatment for skin conditions, like eczema

The information on this page has been adapted by NHS Wales from original content supplied by NHS UK NHS website
Last Updated: 06/12/2023 13:55:42