As the pace of human life has changed, sleep quality has become a more common problem among adults. There are many reasons for the decline of sleep quality, such as difficulty in falling asleep, difficulty in staying asleep after waking up, and excessive dreaming, which will affect the next day’s life and brain function in serious cases. Some people fall asleep normally, but they feel dreamy during sleep and tired after waking up, the reasons are mainly the following: 1. In addition, the excessive burden and the stimulation of the events in life may also lead to excessive dreaming, such as nervousness before bedtime, worrying about the symptoms of excessive dreaming, etc.; 2, physiological factors: some discomfort of human beings when they are awake may be brought to the dream, such as being too full or too hungry before bedtime, daily smoking or drinking a lot of alcohol, drinking coffee, tea or functional drinks, vigorous exercise before bedtime to cause mental excitement, too long sleep time during the day, etc.; 3, environmental factors: poor sleep environment or changes in the sleep environment may lead to poor sleep. or sleep environment change may lead to sleep insubstantial, sleep process stimulated by various environmental factors outside the body, such as light, temperature, sound, etc., will also affect the quality of sleep. 4, physical factors: some diseases are also reflected in dreams, for example, neurological diseases will often dream of being hit on the head, auditory center lesions will appear strange sounds in dreams, respiratory system diseases often dream of poor breathing, etc.; there are also long-term use of certain drugs can also lead to excessive dreams. In short, psychological, physiological, environmental and physical factors can cause daily dreaming, so dreaming is not terrible, and even has a regulatory effect on brain function. We should treat it with a calm mind, develop good sleep habits and improve the quality of sleep.