Infections - Bacterial & Viral
Impetigo
WHAT IS IT
A common bacterial skin infection
HOW COMMON
Very common, especially in children
CONTAGIOUS?
Yes — spreads easily by contact
CURABLE?
Yes — with antibiotics
What Is It?
Impetigo is a common, contagious skin infection that causes red sores or blisters, often around the nose and mouth, which burst and form a honey-colored crust. It's most common in young children and spreads easily through close contact. It usually clears quickly with antibiotic treatment.
Signs & Symptoms
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Red sores or blisters, often around the nose and mouth
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Sores that burst and form a honey-colored crust
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Itching and mild soreness
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Spreads to nearby skin or other people with contact
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Usually no fever in simple cases
Why Does It Happen?
Impetigo is caused by bacteria (usually Staph or Strep) entering the skin through small breaks — cuts, scratches, insect bites, or eczema. It spreads by touching the sores or shared items like towels. Warm, humid weather and crowded settings make it more common. It clears well with treatment but is contagious until then.
Treatment Options
Antibiotics clear impetigo — a cream for limited cases, or oral antibiotics for more widespread infection. Good hygiene limits spread to others.
TOPICAL ANTIBIOTICS
Antibiotic ointment for small, localized areas.
ORAL ANTIBIOTICS
For widespread infection or multiple sores.
GENTLE CLEANSING
Soak off crusts gently and keep the area clean.
LIMIT SPREAD
Cover sores; don't share towels; wash hands often.
Tips for Managing It at Home
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Keep sores clean and covered; wash hands frequently
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Don't share towels, clothing, or bedding until healed
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Keep children home from school until no longer contagious (per provider)
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Finish the full course of antibiotics
When to Call Your Provider
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Sores spread, worsen, or don't improve after a few days
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Fever, swelling, or increasing redness and pain
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Deep, painful sores or many sores
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Recurrent impetigo or a household outbreak
Sources & further reading
The information in this handout is based on general dermatology guidance from the reputable organizations below. These links are provided for patients who wish to read more from trusted sources.
American Academy of Dermatology (AAD). Impetigo. https://www.aad.org/public/diseases/a-z/impetigo-overview
Centers for Disease Control and Prevention (CDC). Impetigo (Group A Strep). https://www.cdc.gov/group-a-strep/about/impetigo.html
DermNet. Impetigo. https://dermnetnz.org/topics/impetigo
This handout is for general education and does not replace advice from your own provider. Always follow your provider’s specific instructions.
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