FEVER

By Mayo Clinic staff

Overview
When you or your children aren't feeling well, one of the first things you may do is check for a fever. Although a fever isn't an illness itself, it's usually a sign that something's going on in your body. Yet fevers aren't necessarily bad. In fact, they seem to play a key role in helping your body fight off a number of bacterial and viral infections.

If you're an adult, a fever may be uncomfortable, but it usually isn't dangerous unless it measures 103 F or higher. For very young children and infants, however, even slightly elevated temperatures may indicate a serious infection. In newborns, a subnormal temperature — rather than a fever — may be a sign of serious illness.


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