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A fever is an increase in the body's temperature. It is usually defined as a temperature of 100.4°F (38°C) or higher. In children older than 3 months, a brief mild or moderate fever generally has no long-term effect, and it usually does not need treatment. In children younger than 3 months, a fever may indicate a serious problem. A high fever in babies and toddlers can sometimes trigger a seizure (febrile seizure). The sweating that may occur with repeated or prolonged fever may also cause a loss of fluid in the body (dehydration).
If your child has a seizure:
This information is not intended to replace advice given to you by your health care provider. Make sure you discuss any questions you have with your health care provider.
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