# A rash that doesn't fade: the glass test and the signs to call 911

> A rash or fever that's an emergency: the glass test for a rash that doesn't fade, meningitis warning signs

Illness & fever · Reviewed 2026-10-19 against the sources below · https://livia.baby/learn/urgent-rash

- The glass test: press the side of a clear glass firmly on the spots. If they're still visible through the glass (they don't fade), that's an emergency: call 911. On brown or black skin it's harder to see, so check paler places too: palms, soles, inside the eyelids.
- Don't wait for every sign: if something seems seriously wrong, get help.

## When to call
- Call 911 for a baby who is floppy, unresponsive, hard to wake or much sleepier than usual; has a weak, high-pitched or nonstop cry; has a bulging soft spot; won't feed; or feels cold and shivery with a low temperature.
- Under 3 months, a temperature of 100.4°F (38°C) or higher means being seen right away.
- An unexplained rash with a fever is a reason to call the pediatrician right away, even when it fades.

## In Livia

Livia doesn't log temperatures or rashes. When something seems seriously wrong, call first; afterwards, keep logging feeds and diapers for the doctor.

## Sources

- [NHS (UK)](https://www.nhs.uk/conditions/meningitis/)
- [AAP / HealthyChildren.org](https://www.healthychildren.org/English/health-issues/conditions/fever/Pages/When-to-Call-the-Pediatrician.aspx)

_Education from the sources listed, not medical advice. If you're worried about your child, call your pediatrician; in an emergency, call 911._