Xiaojun, male, 6 years old, accompanied by his parents, came to our insomnia clinic. In the past year, Xiaojun often sat up after 2-3 hours of sleep, opened his eyes, walked around the room aimlessly, and went to the kitchen to dance around with the kitchen knife, and then put down the knife on his own after a few minutes, mumbling to himself. The next morning, he woke up and was completely oblivious to the events of the night. The family thought that Xiaojun had been possessed by an evil spirit or had some strange disease. He was treated at several hospitals but with poor results. After detailed medical history and examination, Xiaojun was suffering from a sleep disorder, namely sleeping sickness. Sleep walking disorder refers to a sudden opening of eyes from a deep sleep with a blank expression, getting up and leaving the bed, slow and monotonous action, lack of purpose. For example, walking back and forth in the room, putting on clothes, pants, shoes and socks upside down, or rubbing the bed sheets and quilts. There are also some people who will do more complicated things, such as opening doors, fetching water, cooking, etc. Each occurrence lasts about 4-6 minutes, behaves in essentially the same way, and wakes up the next morning, denying everything that happened during the night. Sleepwalking is more common in children, with an incidence of 1-6% and a peak at the age of 5-6. The causes are currently thought to be related to several factors: first, excessive grief or psychological stimulation; second, the inability of the family to give the child sufficient care and warmth; and third, the immaturity associated with the development of the central nervous system. Since sleepwalking may appear to be dangerous in some way and may cause uneasiness in others and affect the mental and physical health of the person concerned, it must be prevented and treated. First of all, children who are prone to sleepwalking need not be too alarmed, the vast majority of them will heal themselves as they get older and their central nervous system matures. If it occurs more than 3 times a week, the condition will continue further into adulthood. Secondly, the family should give them a warm and safe living environment, to avoid adverse psychological stimulation. The family should make necessary safety precautions, such as locking the doors and windows, no fire in the room, and no dangerous objects. During sleepwalking, it is generally not recommended to wake him up to avoid excessive reactions. Third, Valium-type drugs are effective for the disease, together with neurotrophic agents.