That is, it is often accompanied by a sense of oppression and chest tightness, which wakes the sleeper. I had a dream when I was sleeping that I felt depressed and had difficulty breathing, which was mostly caused by excessive fatigue, indigestion or excessive tension in the cerebral cortex. Nightmares can be said to be a normal psychological phenomenon, which has nothing to do with ghosts. Usually, it is more likely to happen under the conditions of great pressure, excessive fatigue, abnormal work and rest, insomnia and anxiety.
Science shows that nightmares are caused by transient cerebral ischemia during sleep. When transient cerebral ischemia occurs during the day, people will have terrible symptoms such as dizziness, palpitation, chest tightness, black eyes, tinnitus and various neurological disorders.
Extended data
differential diagnosis
1, the difference between nightmares and night terrors, night terrors have obvious panic manifestations, roaring and vegetative neurosis symptoms, such as accelerated heartbeat and breathing, sweating, dilated pupils and pale face.
2. A nightmare is when a dreaming child wakes up and feels scared, but no one can see any obvious action. The night scares others, and the nightmare scares yourself. Frequent nightmares are mainly due to physical and mental fatigue, excessive excitement and anxiety before going to bed, emotional tension or corruption.
3. After excluding all kinds of factors that lead to nightmares, it will not recur frequently. In addition, with the growth of age, nightmares will naturally decrease or stop.
Baidu encyclopedia-nightmare