(CNN) -- Parents worry a lot about fever, especially the ones that come from illness.
Ironically, despite the sleepless nights that illness-related fevers cause, they are usually the result of the body's normal immune response to an infection. Except for rare occasions, the only time fever itself is dangerous is when it is coming from an outside source.
One common worry that parents have is that their sick child will develop a seizure with a high fever (called a febrile seizure).
Febrile seizures occur in 3% of children between the ages of 6 months and 5 years. That means 97% of children will not develop seizures with fever. While 30% of children with febrile seizures will have more than one, most will not, and there typically will be no lasting problems.
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