When to Call the Pediatrician: A Symptom-by-Symptom Guide
A symptom-by-symptom guide to newborn and infant warning signs — fever, breathing, dehydration, and behavior — and when to call right away.
When to Call the Pediatrician: A Symptom-by-Symptom Guide
Deciding whether to call can be its own kind of stress, especially at 3 a.m. with a fussy baby. Pediatric offices genuinely expect these calls; that's what the after-hours nurse line is for. Here's a symptom-by-symptom guide to help you judge urgency.
Call 911 immediately if your baby is struggling to breathe, has blue lips or face, is unresponsive, or is having a seizure.
Fever
This is the clearest rule in all of infant care: a baby 3 months or younger with a rectal temperature of 100.4°F (38°C) or higher needs a call to the pediatrician right away, day or night, even if the baby otherwise seems fine. A young infant's immune system is too new to take chances, and a rectal reading is the most accurate at this age.
For older babies, how your child acts matters more than the exact number. Call for a high or persistent fever, a fever with a rash, or a feverish baby who is unusually hard to rouse or console.
Breathing
Call, or get emergency care, for fast or labored breathing, grunting with each breath, flaring nostrils, or retractions, the skin sucking in around the ribs, collarbone, or neck. A barky, seal-like cough or audible wheezing also warrants a call.
Feeding, wet diapers, and dehydration
Watch for a baby who refuses to feed, produces far fewer wet diapers than usual, has no tears when crying, a very dry mouth, or a sunken soft spot. These can signal dehydration, which young babies develop quickly, especially alongside vomiting or diarrhea.
Behavior and appearance
Trust changes in how your baby seems, not just specific symptoms. Call for:
- A baby who is very hard to wake, floppy, or listless
- Inconsolable crying that goes on for hours
- A rash that doesn't fade when you press on it (call right away)
- A bulging soft spot
- Repeated forceful vomiting, especially if it's green or bloody, or blood in the stool
Trust yourself
No article can replace the instinct of the person who knows this baby best. If something feels wrong and you can't quite name it, that feeling is reason enough to call. Pediatricians would far rather answer a "probably nothing" question than have you sit at home worrying, so when in doubt, pick up the phone.