Febrile convulsions (formerly known as hyperthermia) are a common condition in childhood. Age of onset: 3 months to 5 weeks of age, with a peak at 18 months and rare after 6 years of age. Body temperature: often above 38.5 degrees Celsius. It occurs at the beginning of an upper respiratory tract infection or acute infectious disease (mostly at the beginning of the disease when the body temperature rises suddenly, 70% of them are induced by upper sensation), mostly within 24 hours after the onset of fever. Exclude intracranial infections and other organic or metabolic abnormalities that cause convulsions. No previous history of fever-free convulsions (epilepsy, etc.). Prevalence: under 5 years of age 3-5%. 5-6% of all pediatric patients. It accounts for 30% of all types of pediatric convulsions and 28% of persistent pediatric convulsions. The prognosis of severe convulsions depends more on the intrinsic etiology of the child and less on the convulsive seizure itself. As for early febrile convulsions, they are gradually recognized during follow-up as other diseases or as epilepsy such as generalized epilepsy with febrile convulsions addition, severe myoclonic epilepsy in infants, temporal lobe epilepsy (hippocampal sclerosis), etc., but mainly due to genetic inheritance and pre-existing abnormalities during the development of the child. The main cause is genetic inheritance and pre-existing abnormalities in the development of the child. Most studies have shown that febrile seizures themselves generally cause less brain damage (except for persistent states). After decades of research, medical practitioners can largely confirm that the majority of febrile convulsions manifest as a benign self-limiting disorder. However, the presence of complex FS or the presence of high-risk factors or frequent FS episodes require a visit to a pediatric neurologist for necessary examination, follow-up, and preventive treatment.