Written & medically reviewed by Dr. Sanjay Anbu, MBBS· Last reviewed
Most childhood rashes are harmless — heat rash, nappy rash, eczema or a passing viral rash. The one you must never miss is a rash that does not fade when pressed, which can signal meningitis.
Viral rashes (with a cold or fever, e.g. hand-foot-mouth, chickenpox)
Hives (raised, itchy welts from an allergy)
When to see a doctor urgently
A rash that does NOT fade when pressed with a glass (do the glass test) — with fever, this is a meningitis emergency
A rash with a high fever, stiff neck, or a very unwell child
Rapid facial/lip swelling or breathing difficulty (severe allergy)
Blistering, raw skin, or a spreading, hot, painful rash
Do the glass test. Press a clear glass firmly over the rash: if the spots do NOT fade, especially with fever, seek emergency care — it can be meningitis/septicaemia. MedDroid gives general information, not a diagnosis.
Frequently asked questions
How do I know if my child’s rash is serious?
Do the glass test — a rash that does not fade under pressure, especially with fever, is an emergency. Also worrying: breathing difficulty, swelling, a stiff neck, or a very unwell child.
What helps nappy rash?
Frequent nappy changes, gentle cleaning, letting the skin air, and a barrier cream. See a doctor if it is severe, raw, or not improving (it may be a fungal infection).
Is a rash with a viral illness normal?
Many viral infections cause a mild rash that clears as the child recovers. Watch for the warning signs above and check if you are unsure.
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.