Impetigo

Impetigo is a common skin infection caused by bacteria. It is very contagious but not usually serious. It often affects young children and starts with red sores or blisters, usually around the nose and mouth, that burst and leave golden-brown crusts.

Last updated Nov 9, 2026

What it is

It is usually treated with an antiseptic or antibiotic cream, and sometimes antibiotic tablets. It usually clears within 7 to 10 days with treatment.

Children should stay off school or nursery until the sores have crusted over or 48 hours after starting antibiotics.

Common signs

  • Red sores or blisters that burst
  • Golden-brown crusts
  • Itchy or sore skin
  • Spreading to other parts of the body

How it is usually diagnosed

  • Examination of the skin
  • A swab, if it keeps coming back

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Notes on episodes and treatment
  • Swab results, if done

Questions to ask your doctor

  • When can my child go back to school?
  • How can we stop it spreading at home?
  • Why does it keep coming back?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Redness spreading quickly, high fever or feeling very unwell: get urgent medical help

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

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