When to Call Your Pediatrician
The short answer
Knowing when to call your pediatrician can be stressful, but a good rule of thumb is: if something about your baby worries you, it is always okay to call. In general, any fever in a baby under 3 months, difficulty breathing, signs of dehydration, or a sudden change in behavior warrants a prompt call. Trust your instincts - you know your baby best, and pediatricians expect and welcome these calls.
Parents everywhere have the same worry. You are doing the right thing by looking into it.
By Age
What to expect by age
In the first three months, babies have immature immune systems and can become seriously ill quickly. Call your pediatrician immediately for any rectal temperature of 100.4°F (38°C) or higher, refusal to eat for two or more consecutive feedings, persistent vomiting, fewer than the expected number of wet diapers, or if your baby is unusually sleepy and difficult to wake. Jaundice that worsens after the first week also warrants a call.
At this age, fevers above 102°F (38.9°C) or lasting more than two days should prompt a call. Contact your doctor if your baby has persistent diarrhea or vomiting, seems to be in pain, has an unusual rash, or is significantly fussier than normal with no obvious explanation. If your baby is pulling at their ears or has a new cough, these are also good reasons to check in.
As babies become more mobile and start solid foods, new situations arise. Call your doctor for fevers lasting more than three days, signs of an allergic reaction after eating a new food, a fall that results in vomiting or loss of consciousness, persistent constipation or diarrhea, or if your baby seems unusually lethargic. Ear infections become common at this age, so ear tugging with fever or fussiness is worth a call.
Toddlers are better at fighting infections but also more prone to injuries as they explore. Call your pediatrician for fevers above 104°F (40°C), fevers lasting more than five days, limping or refusal to use a limb, a rash with fever, signs of dehydration (no tears when crying, dry mouth, reduced urination), or any sudden behavioral change such as extreme irritability or inconsolability.
What Should You Do?
When to take action
- You have a general question about your baby's development, feeding, or sleep that can wait until business hours
- Your baby has mild cold symptoms but is still eating, drinking, and producing wet diapers normally
- Your baby has a low-grade fever (under 102°F in babies over 3 months) and is alert and feeding well
- You want reassurance about a symptom you have read about - calling is always okay
- Your baby has a fever lasting more than 2-3 days, even if they seem otherwise okay
- Your baby has had repeated episodes of vomiting or diarrhea over 24 hours
- Your baby has a new rash that you cannot identify, especially if accompanied by other symptoms
- Your baby is feeding significantly less than usual for more than a day
- Any fever in a baby under 3 months, difficulty breathing (flared nostrils, rib retractions, grunting), blue or gray skin color, a seizure, unresponsiveness, or a bulging soft spot - seek emergency care immediately
- Your baby has signs of severe dehydration: no wet diaper in 6-8 hours, no tears when crying, sunken soft spot, or dry mouth with lethargy
- Your baby has a stiff neck, purple or non-blanching spots on the skin, persistent high-pitched cry, or appears to be in severe pain
Sources
Related Resources
Trust your instincts. If something feels wrong, reach out to your pediatrician.
Worrying about your baby means you care. That is a good thing.
Related Medical Concerns
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Adenoid Hypertrophy and Breathing
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How to Advocate for Your Child's Needs
You know your child better than anyone, and your observations matter. If you feel something is not right with your child's development or health, you have every right to ask questions, request evaluations, and seek second opinions. Advocating for your child is not being difficult - it is being a good parent.
Air Quality and Baby Health
Babies and young children are more vulnerable to air pollution than adults because they breathe faster, their lungs are still developing, and they spend more time close to the ground where some pollutants concentrate. The EPA recommends keeping babies indoors when the Air Quality Index (AQI) exceeds 100 (orange level). During wildfire smoke events, keep windows closed, use air purifiers with HEPA filters, and monitor your child for coughing, wheezing, or difficulty breathing. Long-term exposure to air pollution can affect lung development.
Altitude Sickness in Babies
Babies and toddlers can experience altitude sickness when traveling above 5,000-8,000 feet (1,500-2,500 meters). Symptoms are harder to recognize in infants because they cannot describe how they feel. Watch for unusual fussiness, poor feeding, disrupted sleep, vomiting, and fast breathing. Gradual ascent is the best prevention. Most pediatricians recommend avoiding sleeping at very high altitudes (above 8,000 feet) with infants when possible, and descending immediately if symptoms appear.