Dreams are normal human physiological phenomena that coexist with humans and occur whenever they sleep. Sleep time accounts for about one-third of the whole life, and dreaming time can account for one-fifth of the life, but not necessarily all of them have health effects. Some people feel that they sleep well all night and do not dream, while others feel that they dream all night and do not sleep well. In fact, how much dreaming is not related to the quality of sleep at all, and dreaminess is also one of the manifestations of insomnia. Normal sleep process includes rapid eye movement sleep period and non-rapid eye movement sleep period, and dreams mostly occur in rapid eye movement period. Dreaming at night is considered to be related to short deep sleep period and shallow sleep. The main reasons for dreaming are as follows: 1. psychological factors: mental stress has obvious influence on sleep, for example, “thinking about something during the day, dreaming at night”, if you are always thinking about something during the day, this thing will recur during sleep; 2. habits: too full or too hungry before going to bed, drinking coffee, tea, and so on. 3.Environmental factors: poor sleep environment or change of sleep environment, stimulation by various environmental factors outside the body during sleep, such as light, temperature, sound, etc.; 4.Body factors: some diseases can be reflected in dreams, for example, neurological diseases often dream of being knocked on the head; and long-term use of certain drugs can also cause excessive dreaming. can lead to excessive dreaming. Therefore, there are many reasons for constant dreaming at night, mostly caused by psychological factors, as long as it does not affect the work and study during the day is a normal phenomenon, to maintain a good state of mind, to ensure sufficient deep sleep, appropriate to increase exercise, the problem will soon be solved.