Dreams are a phenomenon influenced by many factors, and the main causes include four aspects: environmental, psychological, physiological and somatic. 1, 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.; 2, psychological factors: excessive psychological burden can also lead to excessive dreaming, such as nervousness before bedtime, worrying about symptoms of excessive dreaming, etc.; if something is always being thought inside during the day, this thing will also recur during sleep; 3. Physiological factors: too full or too hungry before bedtime, daily smoking or drinking a lot of alcohol, drinking coffee, tea or functional drinks, strenuous exercise before bedtime to cause mental excitement, too long sleep during the day, etc.; 4. Physical factors: 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 often dream of poor breathing, etc.; and Long-term use of certain drugs can also lead to excessive dreaming. To sum up, if you dream every day and affect the quality of sleep, you need to find and solve the above causes in time to have a healthy sleep as soon as possible.