For the identification of lethargy and coma, the methods are as follows: first, whether it can be awakened: lethargy is a patient in a state of sleep all day, can be awakened, after awakening, can answer some questions, after answering and then fall asleep. Coma patients can not be awakened, only to pain and other strong stimuli have retraction reaction, such as pressure orbital with pain expression, or limb retraction reaction. Second, the state of consciousness: sleeping patients generally have stable vital signs, and comatose patients, especially those in severe coma, have unstable vital signs. Therefore, lethargy, coma is mainly based on whether the patient can be woken up, as well as the state of consciousness to identify.