A febrile seizure is a convulsion due to high fever (often higher than 100 degrees Fahrenheit or 38 degrees Celsius). This generally occurs within 24 hours of the fever’s onset and affects children without a history of neurological conditions. A febrile seizure is characterized by the shaking of the whole body or the stiffening and twitching of just a particular body part.
There are two classifications: simple and complex. Simple febrile seizures are the most common which lasts from a few seconds to 15 minutes. This is not confined to one body part and does not recur within 24 hours. Complex febrile seizures last longer than 15 minutes and recur within 24 hours which may be located in a certain body part.