The beginning of drowsiness in the elderly may be a physiological condition that does not affect life expectancy, or it may be caused by obstructive sleep apnea hypoventilation syndrome, blood sugar abnormalities, cerebrovascular disease, etc., whose life expectancy is related to the severity of the condition, complications, and so on. 1. Physiological situation: the elderly due to aging caused by the slowing down of blood circulation in the brain, the emergence of night sleep less, daytime drowsiness, simply want to sleep, and can live for how long has no relationship with life, life expectancy is the same as normal people. 2. Pathological conditions (1) Obstructive Sleep Apnea Hypoventilation Syndrome: If the elderly have snoring at night, accompanied by frequent breath-holding, and frequent dozing in the morning, it means that there is Obstructive Sleep Apnea Hypoventilation Syndrome in the body, and there is a risk of sudden cardio-cerebral and cerebral vascular diseases, such as sudden death and stroke, which affects the life span, and the life span is related to whether or not there are complications and their severity. (2) Abnormal blood glucose: If the elderly suffer from diabetes and suddenly develop drowsiness, it is considered that the blood glucose is too high leading to diabetic ketoacidosis or too low leading to cerebral hypoxia, and the life expectancy of the elderly will not be affected if the blood glucose is adjusted well in time. (3) Cerebrovascular disease: If the elderly suffer from severe cerebral atherosclerosis, due to the narrowing of cerebral blood vessels leading to severe ischemia of the brain, in a state of hypoxia, drowsiness, cerebrovascular accidents such as cerebral infarction, cerebral hemorrhage, and other cerebral vascular accidents, the serious can be life-threatening at any time. It is recommended that the elderly who suffer from drowsiness should consult a doctor in time to clarify the cause of the disease, and carry out appropriate treatment according to the cause as soon as possible, so as not to lead to serious adverse consequences.