The causes of fever and convulsion include intracranial diseases and extracranial diseases. Intracranial diseases include viral meningitis, bacterial meningitis, etc.; extracranial diseases include influenza and lobar pneumonia, etc. 1. Intracranial diseases: for example, when bacterial meningitis and viral meningitis develops, the patient’s body temperature is shifted upward due to the invasion of bacteria or viruses, and fever occurs, and because of the meningeal infection, it can lead to neuronal discharges in the brain, which can lead to epileptic seizures and convulsive symptoms. 2. Extracranial diseases: common causes include influenza and lobar pneumonia. When viruses and bacteria invade the human body, the human body’s body temperature regulation point is shifted upward can appear fever, can appear due to high fever caused by convulsions and seizures. When fever and convulsions occur, you should consult a doctor in time, under the guidance of a professional doctor for standardized treatment.