The usual pressure sleep refers to the process of sleep, as if there is a lot of weight on the body and can not breathe feeling, the body consciousness in a hazy state, seemingly sleep non-sleep seemingly awake non-awake, resulting in a sense of psychological fear and confusion, there are several reasons: 1, the scientific explanation is called nightmares, and dreaming is also a physiological phenomenon, when the human body into sleep, a part of the central nervous system is still in When the body goes to sleep, a part of the central nervous system is still in the awake state. This state is not controlled by the will of the person, there will be a hazy feeling, because the body is not controlled by the brain, so it will make people appear fear. 2, due to incorrect sleep position, resulting in the heart and brain in a state of oxygen deprivation, will also lead to the feeling of breathlessness. 3, with daily life, work, learning process of mental stress is related, so usually pay attention to maintain an optimistic state of mind, reduce anxiety The first thing you need to do is to keep an optimistic mindset and reduce anxiety and depression.