Epilepsy, also commonly known as sheep epilepsy, is a sudden and transient brain dysfunction caused by excessive brain cell discharge, characterized by sudden fainting, loss of consciousness, salivation, upward looking eyes, twitching of limbs, or cries in the mouth. However, there are also transient episodes of mental confusion, dullness of the eyes, or twitching of the limbs, which often occur indefinitely. Epilepsy is a clinical syndrome of chronic brain dysfunction caused by multiple causes, and is an episodic, sudden, recurrent, transient disorder of the brain nervous system caused by repeated hyper-synchronous discharges of nerve cell groups in the brain. Depending on the location and extent of abnormal brain discharges, the clinical manifestations of the symptoms vary. The clinical symptoms may include transient motor, sensory, consciousness, behavioral, and vegetative nervous system disorders, or both. The EEG shows epileptiform discharges and laboratory tests are heterogeneous. Epilepsy is characterized by seizures, recurrence and natural remission, and is a chronic, recurrent disorder of brain malfunction. In the interictal period, everything is normal for the patient. Certain factors such as hypoxia, hypoglycemia, and drug intoxication that cause temporary impairment of brain function and produce a single seizure are not considered epilepsy.