Guide
Rashes & skin
Baby rashes are very common and are often harmless Telling everyday rashes from urgent ones
Is this normal?
Baby skin is sensitive and reactive — most rashes are harmless and clear on their own. The single most important check is whether a rash fades when you press a clear glass against it.
Why this happens
Babies' skin barrier is still developing, so it reacts easily to heat, friction, saliva, and new proteins. Most rashes are the skin doing its job — settling once the trigger is removed.
What you might see
- Small red or pink spots on the face, chest or back
- Rough, dry patches (often eczema)
- Heat rash in skin folds when warm
- Blotchy newborn rash that comes and goes
At a glance — tap to jump
Red flag
Get medical help urgently if
- A rash that does NOT fade when pressed with a glass
- Tiny pinprick red/purple spots or bruises appearing
- Fever, stiff neck, or dislike of bright light alongside a rash
- Swelling of the lips, tongue or face (possible allergic reaction)
- Difficulty breathing or noisy breathing
- Floppy, very pale or mottled skin
Watch
Watch more closely if
- Rash is spreading over several hours
- Baby has a mild fever or seems off
- Spots are itchy and disturbing sleep
- New rash after starting a medication or new food
Normal
Usually safe if
- The rash fades when pressed under a glass
- Baby is otherwise well — feeding, alert, no fever
- The rash isn't spreading rapidly
- It improves with cool, loose clothing and a gentle emollient
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Free · 2-minute check · NHS-aligned
In an emergency, always call 999. For advice at any time, call NHS 111 or your GP. LittleNest is here to help you decide — it isn't a diagnosis.