Dreaming is a normal physiological phenomenon of human beings that accompanies people throughout their lives, as long as they sleep they will dream. Dream is a mood produced by combining various information fragments stored in our body and brain during sleep. Nightmare is a kind of palpitation feeling caused by being frightened by the content of the dream during sleep, or the body can not move after waking up, or feeling something pressing on the body, wanting to move and can not move, wanting to shout and can not shout out. But conscious, commonly known as ghost pressure on the bed. But this has nothing to do with ghosts and monsters, it is a normal psychological phenomenon. Normal people can have nightmares occasionally, but if it occurs frequently, it suggests the possibility of sleep diseases. The main causes of nightmares include three kinds: 1, emotions, such as excessive daytime excitement, excessive mood fluctuations or excessive fatigue, irregular work and rest, insomnia, etc., and some psychological pressure leading to anxiety and depression; 2, ischemia and hypoxia of the brain during sleep, such as physical weakness, excessive fear, or taking certain medications leading to low blood pressure, and pillows are too high and so on; 3, alcohol consumption, alcohol has an inhibitory effect on REM, that is, it can inhibit dreaming. Inhibitory effect on REM phase, that is to say, it can inhibit dreaming, but the brain needs to make up for the REM phase after the disappearance of the effect of alcohol, which leads to continuous dreaming, and the chances of nightmares increase.4. Unnormal sleeping posture, such as putting the hand in front of the chest and pressing it on the chest, feeling difficult to breathe, which triggers the nightmares. Generally, nightmares can continue to sleep after the attack and will not bring serious consequences. If there are frequent attacks for a long time, attention needs to be paid. You can regulate the nightmare from the following aspects: 1, weaving beautiful dreams, recalling the dream plot as much as possible, weaving a good ending for the dream, and relieving psychological pressure; 2, guiding method, bending the thumbs of both hands before going to bed, and holding the thumbs with other four fingers inwardly in a fist, and insisting on it for a long time; 3, medication, which may be based on theories of traditional Chinese medicine, and also sedative medicines may be chosen to be taken orally.