The patient’s muscles in one or more parts of the body show rapid, repetitive, clonic or tonic involuntary contractions, called convulsions. Common clinical types: i. Epileptiform convulsions: grand mal seizures, focal seizures, etc.; ii. Symptomatic convulsions: 1. Metabolic convulsions: such as subepilepsy, hypocalcemia, hepatic coma, etc.; 2. Toxic convulsions: seen in lead, mercury, arsenic and CO poisoning; 3. Infectious convulsions: sepsis, toxic bacillary dysentery; 4. Hypoxic convulsions: asphyxia, CO poisoning, etc.; 5. Convulsions due to intracranial disorders: such as tumors, trauma, parasites, inflammation, vascular malformations, etc.; 6. Parasites, inflammation, vascular malformation, etc.; 6, other hyperthermic convulsions, heliosis, etc.; 3, hysterical convulsions; 4, other nature convulsions: rabies, tetanus, hand-foot convulsions, etc.