What is the reason for many dreams?

Dream is a normal physiological phenomenon. Frequent dreams normally indicate that the quality of sleep is reduced and the depth of sleep is not deep enough. Generally, it is closely related to the following factors: First, most dreams are closely related to the stress of working and studying during the day, thus causing mental stress and anxiety for a long time. Second, environmental factors, such as the environment is not quiet and comfortable enough, or too cold and too hot, and excessive dryness and humidity will cause dreaminess. Third, lack of physical exercise and irregular rest. Fourth, drinking strong tea, coffee and various alcoholic beverages before going to bed has a certain relationship.