Baby Fever: When to Go to the Hospital (Guide by Age)
Learn when fever is an emergency, how to measure correctly, and AAP guidelines for treating fever at home.
When Is Fever an Emergency? Fever is a defense mechanism of the body, not a disease. However, in young babies, it can indicate serious infections that need immediate attention. Fever Definition by Measurement Method AAP Recommendation: Use a digital rectal thermometer for the most accurate reading in infants. Fever by Age: When to Go to the ER Newborn (0-28 days) Any fever above 100.4°F (38°C) = emergency. Go to the…