Older people who are drowsy all day and night may be caused by intracranial organic lesions, which should be checked by cranial CT or cranial MRI for clarification. It may also occur if blood pressure is elevated or lowered. Excessive blood pressure may cause hypertensive encephalopathy and the patient may appear drowsy. If the blood pressure is too low, it can lead to transient ischemia and hypoxia in the brain, and the patient can also experience the above symptoms. It may also be caused by mental disorders, such as depression, which is generally characterized by low mood, lack of interest in anything, and lack of confidence in life, or even the patient’s desire to live lightly, and can be characterized by daily mental depression, and can appear drowsy, while the patient may have sleep disorders, including easy early awakening or more dreams during sleep, which affects the patient’s sleep quality and sleep time, and the next day the patient may have the above symptoms, and different treatments should be used for different reasons.