Sleepiness in the elderly indicates chronic ischemia and hypoxia in the brain, and many diseases can lead to this condition, as follows: 1, cardiovascular disease, the heart is equivalent to the human engine, heart disease will lead to insufficient blood output to the brain ischemia, which leads to sleepiness in the elderly; 2, cerebrovascular disease, insufficient blood supply to the brain or cerebral infarction, etc., the patient will easily appear 3, other diseases, such as lung diseases, such as chronic obstructive pulmonary emphysema, can cause chronic hypoxia in the elderly, the elderly will often be sleepy phenomenon; 4, the other is the elderly snore seriously when sleeping, sleep apnea, etc., will also lead to ischemia, hypoxia and sleepy situation.