Depression may appear often nightmares, but often nightmares are not necessarily all because of depression, nightmares mainly have physiological aspects as well as pathological aspects of two different causes: 1, physiological aspects: 1, mental stimulation: if mental stimulation, such as a car accident, earthquake, floods and other events that bring trauma to the psyche, this trauma can not be eliminated for a while, it will produce the phenomenon of frequent nightmares; 2, emotional Fluctuations: when the mood fluctuations before bed, such as often seen or read before bed frightening fragments or stories, etc., often cause stimulation to the brain before bed, thus often nightmares when sleeping; 3, sleep posture: some people often fall asleep after the body flip caused by improper sleep posture, causing the heart to be compressed, may appear breathless dream, thus the phenomenon of frequent nightmares, etc. Second, the pathological aspects: 1, mental illness: if suffering from mental illnesses such as depression, anxiety, etc., due to the psychological and mental state of long-term tension, anxiety, anxiety, sadness, fear, fear and other states, affecting the normal regulatory function of the cerebral cortex, the cerebral cortex of the brain cells rest time less, there will be frequent nightmares; 2, chronic diseases: if suffering from heart disease, chronic obstructive pulmonary Chronic diseases such as heart disease, chronic obstructive pulmonary disease, resulting in breathing during sleep is easily obstructed, because the brain is briefly deprived of oxygen, reflexively causing people to have nightmares during sleep, so patients will often have nightmares. When there are frequent nightmares, you should maintain a good state of mind, exercise more, regular rest and rest, and try not to consume coffee and other foods to improve the quality of sleep. When the situation is serious, you should go to the hospital in time to better solve the problem under the guidance of the doctor.