Wang grandmother is 68 years old, recently she encountered a very headache, her 70-year-old partner does not know what strange disease, since nearly half a year ago after a stroke, often at night after falling asleep, hit people, hit the wall, and sometimes even fall out of bed and hurt themselves, and hit people when they never wake up, the next morning will tell Wang grandmother last night dream and people fighting. Wang’s grandmother was so anxious that she went around asking for medical help, but in the end she couldn’t figure out what was wrong with her partner. Do you know what was wrong with Grandpa Wang? In fact, Grandpa Wang is suffering from a sleep-related disease called rapid eye movement (REM) sleep behavior disorder (RBD). REM sleep behavior disorder (RBD) is a sleep behavior abnormality that occurs during REM sleep, and is one of the most common sleep behavior disorders. It is one of the most common sleep behavior disorders. It is characterized by the loss of dystonic inhibition associated with normal REM sleep and substitution of motor activity consistent with the dream state. Patients are mostly older men aged 60-70 with violent dreams, often accompanied by mental depression, excessive alcohol consumption, cerebrovascular disease and degenerative neurological disorders. RBD is mainly manifested by various involuntary movements or behavioral abnormalities during REM sleep, mostly violent and rough movements, such as punching, kicking, rolling and shouting, hitting, sexual assault, etc., accompanied by vivid and amazing dreams, which often cause self-injury or injury to co-sleepers. The violent behavior is consistent with the violent dream content and can recall the dream scenario after waking up. Episodes can last from a few seconds to a few minutes, mostly occurring after 90 minutes of sleep and towards the end of sleep. The frequency of episodes varies from once a few weeks to several times a night. Patients almost never wake up from the violence and sleep is rarely disturbed. The diagnosis of the disorder usually requires a clear history of sleep injury, confirmed by polysomnography. typical polysomnography in patients with RBD shows increased muscle tone during REM sleep without loss of muscle tone, a large number of action potentials in the chin muscles, and a significant increase in limb movement. the density and number of REM sleep increases, and the proportion of non-rapidly moving eye (NREM) sleep stages 3 and 4 may increase. RBD is often delayed in diagnosis and treatment because it is not well recognized. In fact, treatment of RBD is very simple, and small doses of clonazepam are very effective in the vast majority of patients with RBD, and resistance rarely occurs. However, discontinuation of clonazepam results in a rapid relapse. Although clonazepam usually provides adequate symptom relief, appropriate measures need to be taken to ensure a safe sleep environment to avoid untoward events.