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Hemifacial spasm

Hemifacial spasm, also called tic convulsif, is a syndrome featuring involuntary twitching on one side of the face. The spasm is paroxysmal and irregular, and can be divided into different levels. Meanwhile, it may be aggravated due to tiredness, mental stress or autonomic movement, etc. Hemifacial spasm can be divided into the primary hemifacial spasm and the hemifacial spasm resulting due to sequelae of facial paralysis. The two types can be distinguished from symptoms: the primary hemifacial spasm may occur under a stationary state, and the spasm will alleviate after several minutes and is uncontrolled; the hemifacial spasm is due to sequelae of facial paralysis and will only occur when the patient winks, lifts eyebrows, etc.