Patients in a shallow coma are usually not able to be awakened. Coma is a degree of impaired consciousness that is preceded by somnolence and lethargy, both of which can usually be awakened by relatively strong stimuli. However, once in a coma, all kinds of strong stimuli usually can’t make the patient wake up, the patient’s consciousness is completely lost, there is no purposeful voluntary activities, and can’t open the eyes spontaneously, which is the most serious degree of all the consciousness disorders, and the coma is divided into a light coma, a medium coma, and a deep coma, which can’t be woken up no matter which level it is. The manifestation of light coma is that the patient has relatively few unconscious spontaneous movements while completely losing consciousness, no reaction to strong stimuli around him, including sound, light, etc. He can have avoidance movements when stimulated by pain, and sometimes has a painful expression, but he will not open his eyes, nor will he wake up, let alone answering to his family members, and other normal reflexes, such as pupil-to-light reflex, corneal reflexes, etc., are all normal, and his vital signs will not change significantly. Other normal reflexes, such as pupillary light reflex and corneal reflex, exist normally, and there is no significant change in vital signs. In order to wake up the patient, the first step is to actively treat the primary disease, so that the degree of consciousness impairment is reduced. If the patient is able to enter a drowsy or sleepy state, he or she may be awakened.