Febrile seizure (FS) refers to convulsions that occur during the first days of life, from 3 months to 5 years of age, at the onset of fever or during a rapid rise in body temperature, and require the exclusion of central nervous system infections and any other acute illness that triggers convulsions, as well as a history of no previous febrile seizures. The prevalence is about 2% to 5%, and it is the most common convulsive disorder in infancy and childhood, with a prevalence of 3% to 4%. The term febrile convulsions is inaccurate, and there is no international requirement for the degree of fever to diagnose febrile convulsions. However, febrile convulsions often occur when the body temperature rises fastest and within 24 hours of the onset of fever.