Frequent nightmares may be caused by strong mental stimulation during the day, stressful thoughts, overwork, or some physical and mental diseases, such as brain diseases, heart and respiratory diseases that can lead to ischemia and hypoxia in the brain, which can cause frequent nightmares. Therefore, first of all, patients should do some relevant examinations, such as brain CT, EEG and ECG. Do not drink coffee, strong tea, alcohol and other nerve-exciting drinks before going to bed, and keep an optimistic state of mind. You can also take glutathione and tranquilizer to improve your sleep state.