According to the severity of the disorder of consciousness, there are mainly the following manifestations: First, narcolepsy, narcoleptic patients are in a state of excessive sleep and can be woken up by shouting, and can answer questions correctly after waking up. The patient can be woken up and can fall back to sleep soon after waking up, and can partially answer the correct questions. The patient may be in a hazy state and cannot answer questions correctly. If the patient is in a shallow coma, after the pressure of the orbit or strong pain stimulation, the patient has the response of limb withdrawal, various reflexes are present, and the pupil is sensitive to light reflex. The most serious degree of consciousness impairment is deep coma, the patient does not respond to various stimuli, the light reflex is relatively dull, and can be in a state of death at any time.