Poor sleep quality and frequent dreaming are related to one’s mood or mental stress. If long-term mental stress and low mood will lead to vegetative nerve disorders, thus affecting the nerve function, which will lead to the patient’s long-term shallow sleep state, it will be easy to dream. Cerebral ischemia and hypoxia, for example, if the patient’s long-term nutritional status is poor or in the state of hypoglycemia, the content of nutrients in the body is lowered, which affects the normal pumping function of the heart, and the increase of the body’s energy consumption during the nighttime sleep will cause cerebral ischemia and hypoxia, which will cause the dreaming. Long-term lack of vitamins can also cause similar symptoms, this is because the vitamin substances can effectively protect the nerves, giving nerve nutrients, once the lack of will cause problems with the mental condition. This affects the normal quality of sleep, leading to a long period of light sleep.