Signs before a person dies include changes in vital signs, changes in the state of consciousness, and neuromuscular changes. 1. Changes in vital signs: Vital signs including temperature, pulse, respiration, blood pressure, etc. will change in the late stage of life, for example, body temperature will gradually drop, pulse and heart rate will gradually slow down, and beat will gradually weaken; respiratory rate will gradually slow down, and respiratory arrest may occur in the middle; due to heart failure, blood pressure will continuously drop, etc. 2. Changes in state of consciousness: patients may be drowsy, drowsy or comatose. 3. Neuromuscular changes: manifested as muscle relaxation, various physiological reflexes are weakened or disappeared.