Dream talking during sleep at night, also known as sleep talking, is a very common phenomenon. Dream talking usually occurs at the same time as dreaming, so the content of dream talking is mostly closely related to the dream state. During the entire sleep process, all organs of the body gradually tend to rest, and so do the cells of the brain. The cerebral cortex is gradually inhibited, but for some reasons, the cells in the brain are excited for a long time, and at this time, if they are associated with the nerve cells that control speech, dream talk appears. Therefore, as long as the brain cells are not inhibited, there is a possibility of talking in dreams. Long-term dreaming is related to neurasthenia, such as working too hard, the body cells are in an excited state; dream is the reaction of the subconscious, some impulses and instincts in reality will be repressed, in the dream will be gradually released. Too full or too hungry before going to bed, a lot of sports and activities before going to bed, being in a chaotic and bright environment, etc. cause the brain to be in a state of hyperactivity; psychological factors are also one of the reasons, if the heart is always thinking about a thing or work pressure, resulting in mental tension, emotional instability, will talk about dreams. In short, psychological, physiological and physical factors can cause dreaming during sleep, but this situation is easy to adjust, first of all, to correct the mind, maintain a happy mood, do not think about anything before going to bed, you will soon have a healthy sleep.