There is no clear correlation between frequent dream talking and mental illness, but it may be related to psychological and disease factors. The most important thing is that it is usually related to mental stress, tension, disease or sleep disorders; occasional dreaming is a normal physiological phenomenon and can be treated without special treatment.1. Psychological factors: people who are under long-term stress, nervous and over-excited will sleep at night, the brain will integrate the daytime content and form dreams, resulting in dreaming at night while sleeping. These people should try to relax, before going to bed can take a hot bath, foot bath, etc., do not want to think too much to relieve their own stress and tension. Most people can improve the situation of frequent sleep talking after they get rid of the emotional impact; 2. Disease factors: Previously diagnosed mental illnesses such as schizophrenia can also be manifested as frequent sleep talking, and need to take antipsychotic drugs as prescribed by the doctor to actively control the condition. In addition, patients with childhood neurosis, night terrors, and obstructive sleep apnea syndrome may often talk in their sleep. Childhood neurosis may be related to chronic mental stress and requires the cooperation of the parents to slowly enlighten the child. Night terrors may be related to genetics, growth and development, etc. and may disappear with gradual age. Obstructive sleep apnea syndrome can be treated by weight control, improved sleeping position, continuous positive airway pressure breathing through the nose, nasal surgery, etc. After the condition is controlled, the phenomenon of frequent dream talking can gradually disappear. All of the above factors may cause frequent sleep talking, and psychosis is one of the causes, but frequent sleep talking alone cannot confirm a diagnosis of psychosis. To confirm the diagnosis of psychosis, it is necessary to understand the individual’s growth, whether there is a family history of illness, previous illnesses, and whether there is any head injury, and to conduct systematic examinations based on this, including psychiatric, blood, and imaging examinations and scale tests, to exclude mental illness caused by organic lesions.