A fever isn’t always a problem. Defined as a temporary increase in body temperature, a fever is just a symptom, not an illness.

In fact, sometimes a fever can be a good thing: It’s often a sign that your body is fighting an infection or illness such as one of the following:

• Colds and flu

• Ear infections

• Sinus infections

• Bronchitis

• Pneumonia

• Skin infections

• Bladder and urinary-tract infections

• Appendicitis

 

In children, teething and immunizations may cause a slight fever for a day or two.

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You should seek medical attention for yourself or a child under the following fever scenarios:

• If your child is 3 months old or younger and has a rectal temperature of 100.4 degrees F or higher

• If your child is 3 to 12 months old and has an oral temperature of 102.2 degrees F

• If your child is 2 years old or younger and has a fever that lasts longer than 24 to 48 hours

• Adults with a fever higher than 105 degrees F or a fever over 103 degrees F that rises or lasts longer than 48 hours

 

In addition, you should seek medical care if you have a fever accompanied by rash and bruising, difficulty breathing, and/or pain while urinating. Also consult a doctor if you have recently been vaccinated, visited another country, or have a serious pre-existing illness. Seek out a pediatrician if your child seems confused, has a stiff neck, and/or won’t stop crying.