Drowsiness in 80-year-olds may be a physiological phenomenon, but also pathological causes such as cardiovascular disease, cerebral atherosclerosis, etc., should be promptly consulted to identify the cause of the disease, and, if necessary, to carry out the appropriate treatment. 1. Physiological reasons Because 80 years old is a relatively old age, the older elderly night often sleep latency is long, and the time of deep sleep will be less, so due to the poor quality of sleep at night, there will be sleepy situation. 2. Pathological causes (1) Cardiovascular disease: patients with cardiovascular disease are mainly due to cardiac insufficiency or acute myocardial ischemia, acute myocardial infarction and other reasons, resulting in insufficient blood supply to the brain, which leads to drowsiness. (2) Cerebral atherosclerosis: Patients with cerebral atherosclerosis are prone to drowsiness. This is because atherosclerosis will lead to the slowing down of blood flow, resulting in drowsiness caused by lack of oxygen to brain cells. If physiological causes are excluded, timely consultation should be made to clarify the cause of the disease and appropriate treatment should be carried out if necessary.