Drowsiness in 70-year-olds may be related to physiological factors, or it may be caused by hypothyroidism, cerebrovascular disease and other reasons. 1. Physiological factors: some older people are unable to maintain a normal sleep rhythm and sleep duration, so they are prone to daytime sleepiness and drowsiness, etc. It is recommended to have a reasonable work and rest schedule, appropriate exercise, maintain good habits, and avoid taking too long a nap. 2. Hypothyroidism: the basal metabolic rate of elderly patients with hypothyroidism is relatively low, causing systemic metabolic disorders, which may cause drowsiness, and may be accompanied by slow movement, fatigue and other symptoms. 3. Cerebrovascular disease: with cerebral arteriosclerosis, cerebral infarction, cerebral hemorrhage and other cerebrovascular diseases of the elderly patients, prone to insufficient cerebral blood supply, may cause drowsiness, may also be accompanied by dizziness, headache, speech and other unfavorable performance. Drowsiness in the 70-year-old, may also be related to other factors, if the symptoms continue to be unable to alleviate, should be as early as possible to seek medical attention, to clarify the cause of the disease, to give targeted treatment.