Elderly people always wake up at 3:00 or 4:00 in the middle of the night, mainly because of the degeneration of organ functions with age and the reduction of hormone secretion, which affects normal sleep and is a physiological reason. However, it may also be caused by pathological reasons, such as psychiatric diseases or organic lesions, which may cause the elderly to wake up at three or four o’clock in the middle of the night. Both physiological and pathological reasons may have an impact on health, so appropriate correction is needed. 1. physiological reasons: older people are older, the function of various organs may have different degrees of degeneration, the body’s hormone levels will also be affected, including a decrease in melatonin secretion, resulting in the body can not clearly distinguish the difference between day and night, sleep will become irregular. If the elderly have the habit of napping or always dozing off during the day, it will lead to the above situation, which is a normal manifestation of the aging of the body. It is recommended to appropriately increase outdoor activities during the day, avoid dozing during the day, establish regular sleep habits, and create a good sleep environment; 2. Pathological factors: If the elderly have psychiatric diseases or organic lesions, such as depression, anxiety, heart disease, restless legs syndrome, etc., they may experience uncomfortable symptoms, such as joint pain, convulsions, breathing difficulties, etc., which may affect the normal quality of sleep and lead to night difficulty in sleeping. For poor sleep caused by pathological factors, it is recommended to actively cooperate with clinical treatment, follow medical advice for regular review, and take medication according to the course of treatment to reduce the occurrence of uncomfortable symptoms, thus improving the quality of sleep. Both physiological and pathological causes of the elderly always wake up at 3 or 4 o’clock in the middle of the night, and if they do not sleep well for a long time, it may have an impact on their health, making them prone to fatigue, lack of concentration, increasing the risk of falling and falling out of bed, and possibly aggravating diseases such as hypertension and heart disease.