During sleep, various stimuli inside and outside the body or external stimuli left in the brain during the day will cause certain image activities, also known as dreams. Dreams are normal physiological phenomena, but if the main reasons for regular dreaming may be the following: Psychological factors: If something is always being thought about inside during the day, this thing will also recur during sleep; scientists have found that dreams tend to recreate daytime experiences. Almost all dreams are related to people’s daily work, wishes, imagination, memories, worries, thoughts, worries and other mental activities. In addition, excessive psychological burden can also lead to excessive dreaming, such as nervousness before bedtime, worrying about symptoms of excessive dreaming, etc.; Physiological factors: being too full or too hungry before bedtime, daily smoking or drinking a lot of alcohol, drinking coffee, tea or functional drinks, as well as intense exercise before bedtime leading to mental exhilaration and excessive daytime sleep; Environmental factors: poor sleep environment or change of sleep environment may lead to unrealistic sleep, being subjected to in vitro during sleep Somatic factors: some discomfort in human waking will be brought to the dream, for example, neurological diseases will often dream of being hit on the head, auditory center lesions will appear strange sounds in the dream, and respiratory system diseases often dream of poor breathing, etc. In short, dreams are normal physiological phenomena, and it is normal to dream every day in bed. If it affects the quality of sleep, we should find the cause and adjust it in time to have a good sleep as soon as possible.