Dreaming is a normal physiological phenomenon. Dreaming is closely related to short deep sleep time, insufficient sleep depth and poor sleep quality. Between half an hour before going to bed and 1 hour, it is not appropriate to think about problems or read books. Appropriate physical activities (such as walking) should be carried out to avoid nervous mental activities. You can also eat some foods to prevent insomnia, such as milk and fruits (apples, bananas, pears, etc. ), sugar water and snacks.