Impetigo
Highly contagious bacterial skin infection in children. Causes honey-colored crusted sores that spread by touch.
What to look for
Side-by-side comparison
Normal skin
No crusted sores
Impetigo
Honey-colored crusted sores
Impetigo is a common, highly contagious bacterial skin infection most frequently seen in children aged 2-5 years. It is caused primarily by Staphylococcus aureus and less commonly by group A Streptococcus.
Two main forms exist. Non-bullous impetigo (70% of cases) begins as red sores that quickly rupture, ooze for a few days, then form a characteristic honey-colored (golden-yellow) crust. Bullous impetigo causes larger fluid-filled blisters that remain intact longer before bursting.
Impetigo spreads easily through direct skin contact, shared towels, clothing, or toys. It commonly appears on the face (around the nose and mouth) and hands, and can spread to other body areas through scratching (autoinoculation).
Treatment includes topical antibiotics (mupirocin, retapamulin) for localized disease and oral antibiotics (cephalexin, dicloxacillin) for widespread involvement. Good hygiene - hand washing, keeping sores covered, not sharing personal items - is essential to prevent spread.
Quick self-check
Does this look like impetigo? Answer 2 questions.
Are there sores with a golden-yellow (honey-colored) crust?
Is it in a child and spreading to new areas?
Risk factors
- Childhood (ages 2-5 most common)
- Warm, humid climate
- Crowded living conditions (daycare, schools)
- Pre-existing skin conditions (eczema, cuts, insect bites)
- Contact sports
- Poor hygiene
When to see a dermatologist
- ⚠Honey-colored crusted sores, especially in a child
- ⚠Blisters on the skin of an infant
- ⚠Sores that are spreading despite home care
- ⚠Fever accompanying skin sores
Often confused with
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Full ABCDE check →Frequently asked questions
How long is impetigo contagious?
Impetigo is contagious until 24-48 hours after starting antibiotic treatment, or until the sores have dried and crusted over. Children should stay home from school or daycare until no longer contagious.
Can adults get impetigo?
Yes, though it is much more common in children. Adults can get impetigo, especially those with pre-existing skin conditions (eczema), diabetes, or weakened immune systems.