Dreams are not only a normal physiological phenomenon, but also a normal psychological phenomenon. Generally speaking, as long as it is not a horrible, bloody and overly anxious dream, it has no negative impact on people's physical and mental health.

1: As the saying goes, "Think about it day and night, and dream at night." Most of the strange dreams are related to my wishes, imagination, memory, troubles, thoughts and other spiritual activities in my daily life.

2; The influence of internal and external stimuli. Just like the old book says, "Dream when you are full, and dream when you are hungry", you are overworked during the day, thinking about the next day's work before going to bed or obsessing about unpleasant things during the day, or physical diseases, such as headache and fever, discomfort in a certain part, uncomfortable sleeping posture, soft and tidy bedding, etc. , will have an impact on your dreams. In short, as long as you can forget your dreams the next day, you don't have to affect your work, study and mood.