More than 6 years old high fever convulsions are usually a problem, may be febrile convulsions, but also may be epilepsy, intracranial infection and other diseases lead to. 1. febrile convulsions: febrile convulsions mostly occur in children within 6 years of age, but if the child has a family history of febrile convulsions still occurring at 6 years of age or older, it is possible that genetic factors lead to the phenomenon of febrile convulsions still occurring at 6 years of age. Febrile convulsions are characterized by a sudden loss of consciousness, upward rolling of the eyes, or strabismus, as well as muscle spasms or twitching of the limbs. 2. Epilepsy: fever convulsions in children over 6 years old may be caused by epileptic seizures, the cause of epilepsy is still unclear, considering that it is caused by genetic factors. The main symptoms of the child are high fever, convulsions, generalized tonus, etc. Children with epilepsy may also suffer from sudden loss of consciousness, sudden fall and other symptoms. 3. Intracranial infections: Intracranial infections are caused by bacteria, viruses and other pathogens infecting the skull, and children will have high fever, headache, impaired consciousness, convulsions and other symptoms. Children with intracranial infections also have symptoms such as projectile vomiting and limb weakness. The symptoms of high fever and convulsions in patients over 6 years old are usually problematic, and may be caused by brain tumors and other diseases, parents should take their children to the doctor in time, and early standardized treatment, in order to reduce the adverse effects of the disease.