Erythema toxicum
Also called Newborn rash
- Typical age
- First 2 weeks
- Where
- chest, face, arms, legs
- Fever
- no
- Itchy
- no
- Contagious
- No
- Usually lasts
- 1–2 weeks
What it looks like
Blotchy red patches with small yellow-white bumps in the centre, which move around from day to day. Baby is otherwise well.
On brown and black skin, redness may look purple, grey or darker than surrounding skin; texture (raised, rough, blistered) is often the better clue.
What causes it
Unknown. It is common, harmless and not an infection despite the name.
What helps at home
- No treatment needed.
When to call about erythema toxicum
Call 911 or go to the ER now
- Newborn with fever of 100.4°F (38°C) or more, or low temperature under 97.5°F (36.4°C)
- Rash that does not fade when you press a clear glass against it (possible petechiae or purpura)
- Baby under 3 months with a temperature of 100.4°F (38°C) or higher
Call your pediatrician today
- Blisters or pus-filled spots
- Baby not feeding well
General guidance based on AAP, NHS and CDC advice, not a diagnosis. If your gut says something is wrong, call your pediatrician or nurse line. You never need permission to seek care.
Questions parents ask
Is erythema toxicum dangerous?
No. It affects many healthy newborns and fades without treatment. A newborn who seems unwell or has a fever needs same-day medical care regardless of any rash.
Rashes often confused with erythema toxicum
- Roseola · chest, back, tummy
- Heat rash · neck, chest, armpits
- Chickenpox · face, chest, back