Sleepiness in the elderly should be alert to hypothyroidism, cerebrovascular disease, sleep apnea syndrome and other diseases. 1. Hypothyroidism: If the elderly suffer from hypothyroidism, leading to a decrease in the secretion of thyroid hormones, resulting in a decrease in the body’s basal metabolic rate, it may cause drowsiness in the elderly, which may be accompanied by slowness of movement, fatigue and other symptoms. 2. Cerebrovascular disease: such as cerebral arteriosclerosis, cerebral infarction and other diseases, may lead to cerebral ischemia and hypoxia, which will make the elderly sleepy. 3. Sleep Apnea Syndrome: Most of them are seen in middle-aged and old-aged patients, men are relatively common, and obese people are more likely to occur, the most common performance is snoring accompanied by apnea, and such patients may have abnormal sleep behaviors, such as fear, limb twitching and so on, and they may often have fatigue, lethargy, and unresponsiveness during the daytime. Elderly sleepiness may also be caused by other diseases, and should seek medical treatment as soon as possible, and give targeted treatment after diagnosing the causative factors through further improvement of relevant examinations.