Fever is one of your body's reactions to infection. Usually, normal body temperature doesn't exceed 99° F (37°.3C). (The "normal" value of 98.6° F (37° C) is only a general guide, it actually varies from person to person.)

Elevated temperatures usually aren't dangerous in an adult until they reach 103° F (39.5°C). Taking aspirin or acetaminophen will usually reduce a fever in adults. Never give aspirin to children under the age of 13, and first consult with a health care provider. NEVER give aspirin to anyone who has chicken pox.

Get medical help in these situations:

If a child is 3 months or younger -- (if you are baby-sitting or a sibling)

If the child has a temperature of 103° F (39.5° C)

If the adult has a temperature of at least 103° F (39.5° C) or a temperature of 101° F (38.3° C) that persists for longer than 3 days.

If severe headache, a stiff neck, swelling of the throat or mental confusion accompanies the fever!

If there are no apparent symptoms except a temperature of 101° F (38.3° C) that lasts more than 3 days or a low fever that lasts for several weeks