Sleep talking itself is not harmful to the human body. It is unconscious speech or sound made during sleep, which is not recalled after waking up. This may be caused by the general inhibition of neurons in the brain during sleep and the sudden excitement of the speech motor center during this time. Normal people may occasionally talk in their sleep, but if they talk in their sleep frequently, it may be caused by abnormal development of the nervous system in children, and in adults, it may be accompanied by some psychiatric disorders. In this case, it is necessary to do some appropriate treatment, such as psycho-behavioral treatment, then relieve stress, increase exercise, relaxation and so on. In addition, sleep talking should be distinguished from nocturnal epilepsy. Seizures can also occur with vocalizations, but usually with a more stereotyped voice, unlike dream talking, which is richer in language.