Symptom Checker

Step 4: Read and complete the decision guide to learn more about your symptoms.

Fever in Infants

Getting Started

Fever is very common in children under 12 months of age, and is usually a sign that the body is fighting an infection.

The normal body temperature is 98.6F, or 37C. Doctors generally say that there is a fever when the temperature is 100.4F (38C) or higher.

The best way to take an infant's temperature is rectally with a digital thermometer (never use a glass mercury thermometer). Taking the temperature under the arm, or using an ear thermometer, is less exact.

If your baby has a fever, this guide can help you think about what might be causing it and help you decide if and when you should call the doctor. Please note that this is not meant to take the place of calling or visiting your doctor. If your child has a chronic illness such as sickle cell anemia, or is being treated for any serious illness, you should not use this guide but instead call your doctor immediately.

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Disclaimer: This content should not be considered complete and should not be used in place of a call or visit to a health professional. Use of this content is subject to specific Terms of Use & Medical Disclaimers.

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