Unconsciousness, also known as impaired consciousness, refers to the patient’s impaired perception of the outside world or of himself/herself. When there is an unconsciousness disorder, it is manifested as a decrease in arousal and changes in the content of consciousness. 1. Wakefulness includes drowsiness, drowsiness, coma and other states. (1) Drowsiness: early manifestations of prolonged sleep, can be woken up, can answer questions after waking up, and fall asleep after stopping stimulation. (2) Drowsiness: strong stimulation can be woken up, answer questions incorrectly, and fall asleep soon after stopping stimulation. (3) Coma: the most serious consciousness disorder, strong stimulation can not be awakened, no voluntary activities. 2. The content of consciousness includes fuzzy consciousness and delirium. (1) Ambiguity: Decrease in attention, orientation and reaction. (2) Dementia: manifested as a decline in cognition, attention, memory, etc., and there may be illusions, hallucinations, and language disorders. When consciousness disorder occurs, immediately send the patient to the hospital for consultation, complete the relevant auxiliary examination under the guidance of the physician to clarify the cause of the disease, and carry out systematic treatment according to the cause of the disease and the degree of consciousness state.