The first three days of lung cancer patient’s death should be the general manifestation of the terminal tumor patient, which generally presents the state of cachexia. Cachexia means that the patient is extremely thin, may not be able to eat, or can only eat very little food, the whole body shows extreme weakness, may not be able to get up in bed, or even loss of consciousness or blurred. The respiratory system may show difficulty in breathing, shortness of breath, or inability to cough up phlegm. The circulatory system may show arrhythmia or rapid heartbeat, which may gradually slow down in severe cases. It may also show swelling of the whole body, the body can’t absorb some liquid, and the body may even be in a state of sweating.