Is impetigo contagious?
Last updated September 3, 2026.
Yes, very - impetigo spreads by touching the sores or anything that touched them, and it moves through households, daycares, and sports teams. The CDC notes the bacteria often spread to others in the household, and crowded settings amplify it. The contagious window closes fast with antibiotics; the usual return-to-school rule is about 24 to 48 hours after starting effective treatment - confirm with your provider.
What to do
- Cover the sores loosely. Bandages cut both touching and scratching.
- Quarantine the linens. Separate towels and bedding, hot wash, no shared personal items.
- Trim the nails. Scratching spreads it across the child's own skin.
- Escalate treatment failures. Spreading despite antibiotics, fever, or deeper skin signs: back to the doctor.
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