There is a possibility of awakening from a severe coma, but the chances of awakening are slim. A severe coma is generally considered to be caused by brain disease, traumatic brain injury or severe craniocerebral injury. When a person is in a severe coma, he or she needs to be awakened as soon as possible. If the patient has not awakened within a month, basically the chances of awakening are very small. With the prolongation of severe coma, the chances of awakening will become smaller and smaller, and there is almost no possibility of awakening. During the period of severe coma, various complications may arise, which may be life-threatening. In addition to treating the primary disease and promoting awakening treatment, we must take good care of the patient under the guidance of the doctor to avoid complications, and try to improve the patient’s condition and status, so as to keep the vital signs stable, and the chances of awakening will also increase.