Insomnia is mainly manifested as difficulty in falling asleep, difficulty in waking up easily at night and falling asleep again, less time to maintain sleep, etc. Dreaminess is also an aspect of insomnia. Common causes are as follows: 1. Psychological factors: change of sleep environment or excessive pressure of life and work lead to excessive nervousness or hyperactivity, mood swings, anxiety, etc., which cause excessive concern and worry about insomnia and excessive dreaming; 2. Genetic factors: the incidence of insomnia in people with a family history of insomnia is three times higher than that in people without a family history, and it is easy to sleep deeply enough at night to cause excessive dreaming; 3. Hungry, too long bedtime or irregular rest during the day, excessive coffee or tea during the day, etc.; excessive physical exertion or suffering from certain physical and mental diseases, commonly endocrine diseases, peripheral neuropathy and other patients, or those taking hormones, stimulant drugs; 4, age and gender characteristics: adult women with the gradual increase in age insomnia is also gradually higher, while in childhood there is no difference in gender distribution. Therefore, the causes of insomnia and dreaminess include changes in various factors such as physiological, psychological and environmental factors, as well as multiple aspects such as drugs, neuropsychiatric and somatic disorders. Long-term insomnia will affect the function of the brain and body and should be adjusted early.