Three months ago, 60-year-old Mr. Zhang came to my clinic accompanied by his wife, who complained that her husband had the problem of “sleepwalking” and liked to be violent in his sleep, often hurting others or hurting himself. The incident started seven years ago when Mr. Zhang had a conflict with someone in his business and the other party threatened to kill him. Since then, Mr. Zhang is careful everywhere, but nothing dangerous happened, but his sleep became very bad, sleep difficulties, dreaming throughout the night, the next day woke up very tired, the previous night’s dream content clear. One day six years ago, Mr. Zhang dreamed of a thief breaking into his house at night, immediately “to the thief” a “sweeping leg”, resulting in a kick to the closet. He woke up from the pain, his foot was red and swollen, went to the hospital a film, was diagnosed as “right foot bone fracture”. Since then, he has repeatedly swung his fist in his dreams and “fought with people”, rolled and fell under the bed, often with a bruised face, and became a regular visitor to the hospital. In order to avoid his self-inflicted injuries, his family completely remodeled the bed at home, sawing off the legs and carefully wrapping the four sides of the bed with cloth. Despite this, Mr. Zhang rarely thought about visiting the sleep clinic because he felt that his daily life was not “too affected”. Three months ago, Mr. Zhang came to the clinic for the first time for sleep problems, and the doctor at that time gave him medicine, and Mr. Zhang felt better after taking the medicine, but he was particularly sleepy during the day, so he stopped taking the medicine. Two weeks ago, Mr. Zhang “hit a wild cat” in his dream and ended up punching his wife in the face, who was sleeping next to him, and was forced by his wife to come to my sleep clinic. After routine examination and sleep monitoring, I diagnosed Mr. Zhang with “rapid eye movement sleep behavior disorder (RBD)”. In the REM sleep stage, people dream, but their muscles are relaxed, so even if they have any ideas in their dreams, they cannot put them into practice. Patients with REM sleep behavior disorder, on the other hand, do not lose muscle relaxation during this stage of sleep, which allows them to put their dreams into action and leads to violent and injurious outcomes. Once this disorder is diagnosed, medication is very effective in treating it. I gave Mr. Zhang a very small dose of medication, and now his sleep is normal, he no longer “punches and kicks”, he does not feel sleepy and weak during the day, he is in a good mood, and he is back to his happy life. REM sleep behavior disorder is a kind of sleep disorder. Sleep disorders are very common, with insomnia afflicting 10-15% of the world’s population. Insomnia often coexists with other psychological disorders, such as depression, anxiety, obsessive-compulsive disorder, eating disorders, and alcohol addiction. In addition, insomnia is also closely associated with cardiovascular disease, diabetes, and even leads to an increased risk of cancer development and death. Many patients are reluctant to go to the hospital to treat their sleep problems because, firstly, they feel that their condition is not serious and does not affect them much. Secondly, they are afraid that if the doctor dispenses sleeping pills, they will become addicted and get Alzheimer’s disease. In fact, with regular treatment, insomnia can be cured and the medication can be gradually reduced to completely stopped as the condition stabilizes. If you have a sleep problem, instead of tossing and turning in bed every night, you may want to visit a regular psychological clinic.