Sleep accounts for about one-third of the time in normal human life, and good sleep can restore physical and mental strength. However, some people will have dreaming situations or self-perceptions during sleep. The common reasons for always dreaming in sleep are somatic, physiological, environmental and psychological factors: 1. Somatic factors: some discomfort will be brought to dreams when humans are awake, and some diseases can be reflected in dreams, such as neurological diseases, respiratory diseases and the effects of certain drugs. 2, physiological factors: too full or too hungry before going to bed, a lot of history of smoking and drinking, drinking coffee, tea or functional drinks, strenuous exercise before going to bed to cause mental hyperactivity, too long sleep time during the day, etc. 3.Environmental factors: poor sleep environment or sleep environment changes lead to sleep, sleep process is stimulated by various environmental factors outside the body, such as light, temperature, sound, etc. 4.Psychological factors: It is often said that “there are thoughts in the day and dreams in the night”, if you are always thinking about something during the day, it will recur during sleep; in addition, excessive psychological burden will also lead to excessive dreams, such as nervousness before going to bed, worrying about the symptoms of excessive dreams, etc. Overall, physical discomfort, physiological, environmental and psychological factors can cause the phenomenon of dreaming, and it is necessary to adjust the physical state in time, avoid mental exertion before going to sleep, and take targeted measures to relieve it if necessary.