@drjasonpediatrics: A fever in a baby under 3 months is not a wait-til-morning situation. The threshold is 100.4°F (38°C) rectal — and at this age, fever can be the only warning sign of a serious infection (in the blood, urine, or the fluid around the brain). This is the one I never want a parent to second-guess. Save it. Send it to someone with a newborn. #newborn #infant #fever #firsttimeparents #pediatrician. Shoutout to @Beachgem10 who I’m sure has seen newborns with fever in the ER!

Dr. Jason Levine, DO FAAP

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Wednesday 03 June 2026 00:02:00 GMT

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AhNyiaa Balenciaga :

Is under the armpit accurate as well ? Also should I be checking baby temp regularly?

2026-06-16 05:10:54

Dr. Jason Levine, DO FAAP :

To be precise: AAP defines fever as 100.4°F / 38°C rectal. The formal guideline covers 8–60 days in three age bands; 0–7 days is handled even more cautiously. Rectal temp is the standard at this age. If you’re taking one: insert no more than ½ inch, and never force against resistance. When in doubt, call your pediatrician — that’s what we’re here for.

2026-06-03 00:31:15

Kylee__R.T.(R) :

Should we be checking nightly? Are there any other warning signs?

2026-07-27 14:40:18

Fany :

What shots do they get at their two month mark ?

2026-06-03 00:52:30

lrh2996 :

How often are you supposed to be checking? 🙈

2026-06-24 01:53:30

Diona :

that's assuming they'll ever be given the poisonous jabs in the first place

2026-06-08 00:52:35

ceceliaclark51 :

😁😁😁

2026-06-04 06:15:54

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