Epilepsy is a common paroxysmal nervous system dysfunction disease, commonly known as epilepsy. It is a chronic recurrent transient brain dysfunction syndrome, which is characterized by repeated attacks caused by abnormal discharge of brain neurons and is a common cause of paroxysmal loss of consciousness.

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2. Clinical classification

Clinically, it can be divided into primary epilepsy and secondary epilepsy according to its etiology. Primary epilepsy refers to epilepsy without brain organic or metabolic diseases, which occurs in children and adolescence. The etiology of secondary epilepsy is caused by various brain organic diseases or metabolic disorders, such as: ① brain diseases: including congenital brain dysplasia, birth injury, craniocerebral injury, brain abscess, brain tumor, encephalitis, cerebrovascular disease, brain degeneration and so on.