Childhood Rashes: When to Seek Urgent Help

Key Information

• Most Rashes are Harmless: Seeing a rash on your child is worrying, but the majority are caused by common viruses and will clear up on their own.
• The Glass Test (Meningitis Check): The most critical check is for a rash that does not fade under pressure. Press a clear glass firmly against the rash. If the spots remain visible through the glass, this is a medical emergency.
• The Red Flags: You must seek immediate help if your child has a rash AND any of the following signs:
  • Breathing: They are struggling to breathe. Look for the chest or stomach sucking in with each breath, or listen for grunting noises.
  • Behaviour: They are floppy, drowsy, very difficult to wake up, or unresponsive.
  • Fits: They have a seizure or convulsion.
  • Cry: They have a weak, high-pitched cry that sounds different from their normal cry.

What Happens Next?

Immediate Emergency (Call 999 or go to A&E):

If you see a non-fading rash (failed glass test) OR any of the Red Flags listed above (breathing issues, floppiness, seizures), do not wait. Seek emergency help immediately.

Non-Urgent Concern:

If your child does not have these red flags but has a rash or fever and you are worried, please contact us for advice or call NHS 111.

Further Information

To see photos of common childhood rashes (like chickenpox, measles, or heat rash) to help you identify what your child might have, please visit the NHS visual guide.

Last reviewed: 22 December 2025
Next review due: 22 December 2028