REM sleep behavior disorder mainly refers to the appearance of a series of abnormal behaviors during sleep, such as shouting, singing, crying, running, etc., which belongs to a type of heteromorphic sleep. The sleep cycle is divided into REM period and non-REM period. REM sleep is mainly the period in which dreams appear, and REM sleep behavior disorder refers to the appearance of abnormal behaviors during this period, which are mostly accompanied by the appearance of dreams. Abnormal behaviors include speech, shouting, laughing, crying, running, etc. The episodes are mostly with eyes closed, and they are seldom seen because of disturbed sleep, but mostly due to harm to the group of people in the same room, and it is recommended that those who have this condition see a doctor promptly.