During human sleep, various stimuli inside and outside the body or external stimuli left in the brain during the day will form certain image activities in the brain, and these activities are the manifestation of dreams. Due to the different stimuli experienced every day, dreams can exist in many forms, which can also cause someone to dream every day, as long as it does not affect the daytime life is normal. The main reasons for dreaming in bed are as follows: environmental factors: 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.; psychological factors: if you are always thinking about something during the day, this matter will also recur during sleep; in addition, excessive psychological burden can also lead to excessive dreaming, such as before bedtime Physiological factors: too full or too hungry before sleep, daily smoking or drinking a lot of alcohol, drinking coffee, tea or functional drinks, strenuous exercise before sleep to cause mental excitement, too long sleep time during the day, etc. In addition, some diseases can be 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 In addition, some diseases can be reflected in dreams. In summary, dream is a normal human physiological phenomenon, which is triggered by various stimuli, so don’t worry about dreaming as long as it doesn’t affect the quality of sleep.