The inability to move at night is called sleep paralysis, which is a common form of sleep disorder that can occur in many normal people. It is easy to appear when the patient has just fallen asleep or is about to wake up. The main reason is that the patient is emotionally tense, anxious, mentally more hyperactive, and physically overworked, which causes the patient to wake up mentally before physically in the sleep state, and the consciousness cannot command the brain to carry out activities, and the patient is consciously between half asleep and half awake. Sometimes there are vivid hallucinations, feeling that they can see images or hear sounds around them, but no matter how hard they try, they cannot move their bodies, nor can they speak or open their eyes. This condition will improve on its own after a few minutes, and the patient will feel tired, but it has no significant effect on physical health.