Baby Fever Guide: What to Do at Every Temperature

Baby has a fever! Learn what to do at each temperature level, how to use fever reducers safely, and when to go to the ER.

What is a Fever?

Fever is your body's normal immune response to fight infection. Fever itself isn't harmful—it's a sign that the body is fighting pathogens.

Note: According to pediatric guidelines, infant fever is defined as a rectal temperature of 100.4°F (38°C) or higher.

How to Measure Temperature

Recommended Methods by Age

Age	Recommended Method	Accuracy
0-3 months	Rectal	Most accurate
3 months-3 years	Rectal, armpit, ear	Rectal most accurate
3+ years	Oral, ear, armpit	Oral accurate

Normal Temperature Ranges

Location	Normal Range	Fever
Rectal	97.9-100.4°F	100.4°F+
Oral	95.9-99.5°F	99.5°F+
Armpit	94.5-99.1°F	99.1°F+
Ear	96.4-100.4°F	100.4°F+

What to Do at Each Temperature

99.5-100.4°F (Low-grade Fever)

• Dress in light clothing
• Keep room comfortable
• Offer plenty of fluids
• No fever reducer needed usually

100.4-101.3°F (Fever)

• Consider fever reducer if baby seems uncomfortable
• Lukewarm sponge bath
• Keep hydrated

101.3-102.2°F (High Fever)

• Give fever reducer
• Lukewarm sponge bath
• Light clothing only
• Under 3 months: Go to doctor immediately!

102.2°F+ (Very High Fever)

• Give fever reducer, observe for 30 minutes
• If fever doesn't drop, seek medical care
• Watch for serious symptoms

When to Go to the ER

🚨 Go Immediately If:

Any age:

• Seizures
• Difficult to wake or confused
• Difficulty breathing
• Blue lips or nails
• Purple spots/rash that doesn't fade
• Signs of dehydration

Under 3 months:

• Any fever 100.4°F or higher

Track with BebeSnap

Record your baby's temperature and symptoms systematically. BebeSnap helps you:

• Log temperature readings with time
• Record fever reducer doses
• Note symptom changes
• Share records with your doctor

👉 Get parenting advice from BebeSnap AI Chatbot