Impetigo is a skin infection. It often appears as blisters around the mouth and nose but it can infect skin anywhere on the body. Impetigo can easily spread from one person to another. This infection occurs most often in children.

Impetigo: Sores on the Upper Lip
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Impetigo is caused by bacteria. The most common type of bacteria associated with this infection includes:

  • Group A Streptococcus
  • Staphylococcus

These types of bacteria are normally found on the skin and in the nose. The bacteria do not cause trouble until it gets under the skin. Bacteria get in under the skin through small cuts, scratches, or insect bites.