Nightmares refer to people who dream some frightening things while sleeping, or feel something pressing on their bodies, but they can't move, so they feel scared and scream. The medical explanation is that the body has experienced some shocking things or some symptoms caused by excessive pressure, excessive tension in the cerebral cortex and physical and mental fatigue.
When we suddenly wake up from sleep, our brains are completely awake, but our bodies can't move. At this time, our muscles and nerves are not awake, just like our incompetence. Here, "strength" refers to the muscles and nerves of the body, and "heart" refers to our spirit, our consciousness and thoughts. This condition may be accompanied by dyspnea, chest tightness, shortness of breath and depression.
This is a nightmare from a scientific point of view, which is also commonly known as the "ghost bed". But I think, believe everything, and if you don't believe it, there is nothing. Next, I want to talk about a friend's experience.
When he could remember in primary school, he and his grandfather had a very good relationship before his death. His grandfather loves him and dotes on him. Then his grandfather passed away. When he is buried, he must go with him. The next day he went home and began to have a high fever. He had a fever for three days, and it didn't work to take medicine or injections. An old man in a relative said to try putting scissors under the child's pillow.
Guess what? If the fever really goes down, the old man said that the baby's grandfather likes the baby very much and wants to take the baby with him. He put a pair of scissors to cut the thread that grandpa took the baby away, so that the baby would be fine.
Of course, don't be afraid if you have symptoms of "ghosts pressing the bed". It's not scary at all. Believe in science and go to the hospital to find a doctor to solve it.