Physiological changes in older men can be seen in the skin, senses, oral cavity, respiratory system, circulation, digestion, urinary system, endocrine and metabolism. 1. Skin: Skin becomes thinner and drier, prone to breakouts and infections, and itching. 2. Senses: vision loss, diminished dark adaptation, decreased resolution of sound, decreased salty taste, etc. may occur. 3. Mouth: tooth loss, increased caries, etc. may occur. 4. Respiratory system: susceptible to sleep apnea. 5. Circulatory system: an increase in systolic blood pressure, an increase in pulse pressure, etc. may occur. 6. Digestive system: decreased peristalsis of the gastrointestinal tract is prone to dyspepsia, constipation, etc.; blood flow to the stomach wall decreases. 7. Genitourinary system: the secretion function of renal tubules decreases, and renal blood flow decreases. 8. Endocrine and metabolic: growth hormone, testosterone and other secretion decrease, free radical scavenging rate decreases. The human body to the age of 70 years old in all aspects of the function decline, so in general more need to pay attention to rest, to avoid overwork, discomfort should be timely to the hospital.