Dreams are the image activities caused by various stimuli inside and outside the body or external stimuli left in the brain during the daytime during sleep. Therefore, the cause of dreaming every night is also various stimuli inside and outside the body and external stimuli left during the day. In addition, some discomfort in waking hours can be brought to dreams, and some diseases can be reflected in dreams, for example, neurological diseases can often dream of being hit on the head, auditory center lesions can appear strange sounds in dreams, respiratory system diseases can often dream of Respiratory disorders often lead to poor breathing, etc.; and long-term use of certain drugs can also lead to excessive dreaming. Poor sleep environment or change of sleep environment may lead to unrealistic sleep, stimulated by various environmental factors outside the body during sleep, such as light, temperature, sound, etc.; if you always think about something inside during the day, this thing will also recur during sleep; excessive psychological burden will also lead to excessive dreaming, such as nervousness before sleep, worrying about symptoms of excessive dreaming, etc.; to sum up, dreaming is a normal physiological phenomenon of human beings. Normal people may have dreams every day. If it does not affect the daily life, there is no need to worry; if it affects the quality of sleep, you need to pay attention to it and adjust it in time.