When to Call Your Pediatrician
Medically reviewed by Dr. Michael Okonkwo, MD, FAAP · Board-Certified Neonatologist
Content reviewed against published AAP, AAP, CDC guidelines
Last reviewed:
If your baby has been diagnosed with or you suspect when to call your pediatrician, here is what the evidence says.
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.
Key takeaways
- 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.
- Usually normal when: You have a general question about your baby's development, feeding, or sleep that can wait until business hours
- Call your doctor if: 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
- Varies by age — see the age-by-age breakdown below
“Fever itself is not an illness — rather, it is a sign or symptom that the body is fighting an infection. Fever stimulates certain defenses, such as the white blood cells, which attack and destroy invading bacteria.”
Parents everywhere have the same worry. You are doing the right thing by looking into it.
What Parents Should Know
According to AAP, CDC guidelines, 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. At 0-3 months, 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. It is generally considered normal when you have a general question about your baby's development, feeding, or sleep that can wait until business hours. However, you should contact your pediatrician promptly if 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.
Normal vs. Concerning
When to Seek Immediate Care
- 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
By Age
What to expect by age
0-3 months
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.
3-6 months
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.
6-12 months
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.
12-36 months
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 to Tell Your Pediatrician
- Describe when you first noticed when to call your pediatrician and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your baby has a fever lasting more than 2-3 days, even if they seem otherwise okay.
- Mention if your baby has had repeated episodes of vomiting or diarrhea over 24 hours.
- Bring a list of any questions or observations you want to discuss at the appointment.
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
What You Can Do at Home
- Keep track of when you notice when to call your pediatrician — noting the time of day, duration, and any triggers can help your pediatrician.
- Remember that you have a general question about your baby's development, feeding, or sleep that can wait until business hours — this is generally within the range of normal.
- At 0-3 months, focus on observation rather than intervention unless your pediatrician advises otherwise.
- Follow any care instructions from your pediatrician. Keep a written log of symptoms to bring to appointments.
- While monitoring at home, seek immediate care if 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.
Related Resources
Frequently asked questions
Is when to call your pediatrician normal?
When should I call the doctor about when to call your pediatrician?
When is when to call your pediatrician normal?
What causes when to call your pediatrician?
What should I mention to my pediatrician about when to call your pediatrician?
Is when to call your pediatrician normal at 0-3 months?
Is when to call your pediatrician normal at 3-6 months?
Should I go to the ER for when to call your pediatrician?
Does when to call your pediatrician go away on its own?
References
Doctor Visit Checklist
Bring this checklist to your next pediatrician visit to discuss When to Call Your Pediatrician.
Things to mention
- Describe when you first noticed when to call your pediatrician and how it has changed over time.
- Note your baby's current age and which age-specific patterns you are seeing.
- Mention if your baby has a fever lasting more than 2-3 days, even if they seem otherwise okay.
- Mention if your baby has had repeated episodes of vomiting or diarrhea over 24 hours.
- Bring a list of any questions or observations you want to discuss at the appointment.
Observations to share
- 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
Urgent signs to report immediately
- 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
My notes
From ismybabyalright.com — free, evidence-based baby health guides
All content follows our editorial policy and is reviewed against published clinical guidelines.
2,705 evidence-based guides6 authoritative medical sources5 medical advisory board members
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Bottom line
Most cases of when to call your pediatrician are normal. Talk to your pediatrician if 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.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
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