The presence of violent movement of the limbs during sleep is most commonly associated with a specific sleep disorder called fast-wave sleep behavior disorder. This disorder is usually seen in older adults between the ages of 60 and 70, but can begin at any other age. The prevalence is much higher in men than in women. It is characterized by a variety of involuntary movements of the face and limbs, accompanied by dreaming, during the period of fast-wave sleep, 90 minutes after the onset of sleep. The episodes are characterized by a variety of complex and abnormal behaviors, with violent and violent movements, such as punching, kicking, rolling, jumping, shouting, repeatedly falling out of bed and causing injuries to bedmates. Seizures can cause 1/3 of the patients to injure themselves or others, and it is often at this point that the patients or bedmates pay attention to them and seek medical attention. After a seizure, some patients can partially recall the nightmare, and the content of the dream is often violent and unpleasant and very vivid. Behavioral abnormalities during an episode are usually related to the content of the reported dream. When frequent episodes disrupt sleep to a certain degree, patients may experience daytime sleepiness. Studies have shown that this phenomenon usually occurs during the period of fast-wave sleep, which is the time of dreaming, but most patients do not recall the content of the dreams themselves and are unaware of the abnormal behavior that occurs. Seizures occur about once a week, but can occur more than four times a night for several days. Patients also often have frequent periodic limb movements or non-periodic limb twitches during slow fast sleep, but they do not disrupt the deep sleep period and may even have prolonged slow wave sleep stages 3 and 4. Injuries to oneself or bedmates (lacerations, subcutaneous hematomas, fractures, etc.) and damage to the surroundings are the main complications of the disease. Sometimes the effects on bedmates can have significant social consequences. Individuals exhibit only frequent muscle twitching and mumbling during sleep, but feel normal in their sleep and are able to narrate dream-like mental activities upon awakening. The onset of the disease is age-related, so increasing age is an obvious factor in its development, but the onset in 40% of patients is associated with neurological disorders, especially multisystem degeneration and Parkinson’s disease, commonly following the onset of multisystem degeneration but seen before or after the onset of Parkinson’s disease. Fast-wave sleep behavior disorder is also seen in Alzheimer’s disease, amyotrophic lateral sclerosis, subarachnoid hemorrhage, ischemic cerebrovascular disease, encephalitis, multiple sclerosis, and brainstem tumors. The disease can also occur during the application or withdrawal of certain drugs, such as multiple psychotropic drugs, especially after long-term alcohol abuse and withdrawal of sedative and sleeping drugs. When a correct diagnosis is obtained, pharmacological treatment of the disease is highly effective and can control clinical episodes in a few days.