When to Call a Doctor for Fever During Pregnancy

If you’re expecting and suddenly feel hot, it’s easy to wonder whether it’s just a common cold or something more serious. A fever can signal an infection that might affect both you and your baby, so knowing when to pick up the phone is key.

Key Warning Signs You Shouldn't Ignore

Most fevers during pregnancy are low‑grade (under 100.4°F / 38°C) and can be managed at home with rest and fluids. But watch out for these red flags:

• Temperature above 101°F (38.3°C) that won’t come down with acetaminophen.
• Fever lasting more than 24‑48 hours without improvement.
• Painful urination, severe headache, or stiff neck.
• Persistent vomiting, diarrhea, or inability to keep fluids down.
• Reduced fetal movement – if you notice a sudden drop, call right away.

Any of these symptoms means it’s time to talk to your prenatal care provider or head to urgent care. Infections like urinary tract infections, flu, or listeria can raise risks for preterm labor and other complications, so early treatment matters.

What to Do Before Calling Your Doctor

Before you dial, gather a few details that help the clinician decide how urgent it is:

• Current temperature – use a digital thermometer and note the exact reading.
• How long the fever has lasted and any medication you’ve taken (e.g., acetaminophen dosage).
• Other symptoms such as chills, cough, sore throat, or abdominal pain.
• Pregnancy week – some infections are riskier later in the third trimester.

While you wait for advice, stay hydrated with water, clear broth, or electrolyte drinks. Rest in a cool room and use a damp washcloth on your forehead if you feel hot. Acetaminophen (Tylenol) is generally safe in pregnancy; avoid ibuprofen or aspirin unless your doctor says otherwise.

If the fever spikes quickly above 103°F (39.4°C), you feel dizzy, have a rapid heartbeat, or notice any bleeding, treat it as an emergency and go to the nearest ER. Those signs could point to sepsis or other serious conditions that need immediate care.

Remember, calling your doctor isn’t a sign of overreacting – it’s protecting you and your baby. Most prenatal teams encourage patients to reach out for anything above 100.4°F or any symptom that feels “off.” A quick call can save you from unnecessary stress and ensure the right treatment starts early.

Bottom line: keep a thermometer handy, track how long the fever lasts, watch for warning signs, and don’t hesitate to contact your healthcare provider if anything feels abnormal. Your peace of mind—and your baby’s health—are worth that short phone call.