Diaper rash
Also called Nappy rash
- Typical age
- 0–3 years
- Where
- diaper area
- Fever
- no
- Itchy
- mild
- Contagious
- No
- Usually lasts
- 2–3 days with good care
What it looks like
Red, sore-looking skin on the bottom, genitals and thighs where the diaper touches. Folds are often spared in simple irritant rash.
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
Moisture, friction and contact with pee and poop. Diarrhea and new foods can trigger it.
What helps at home
- Change diapers often and let skin air-dry for a few minutes.
- Apply a thick barrier cream (zinc oxide or petroleum jelly) at every change.
- Use water or fragrance-free wipes; pat, don’t rub.
When to call about diaper rash
Call 911 or go to the ER now
- Rash with fever in a baby under 3 months
- 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
- Bright red rash with small red dots at the edges or in skin folds (possible yeast)
- Blisters, pus or open sores
- Not better after 3 days of care
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
How do I know if it’s a yeast diaper rash?
Yeast rashes tend to be bright red, invade the skin folds and have small red satellite spots around the edges. They need an antifungal cream, so ask your pediatrician.
Rashes often confused with diaper rash
- Hand, foot and mouth disease · mouth, hands, feet
- Heat rash · neck, chest, armpits