The reasons why the elderly are prone to falls are as follows: 1. Due to ageing, various body functions change significantly. The central nervous system control and vestibular sensory ability decreases, leading to longer reaction time and unstable balance in the elderly, increasing the risk of falls; 2. The elderly are prone to accumulate drugs in the kidneys due to poor kidney and slower excretion of some drugs, which can easily accumulate in the body. For example, hypertension, diabetes, insomnia, long-term use of antihypertensive drugs, hypoglycemic drugs, sedative, hypnotic, anti-anxiety, depression drugs. Side effects such as hypoglycemia and hypotension are easily produced after medication. At the same time, the side effects of drugs can also cause the elderly patients to have decreased balance, unstable gait, visual impairment, and slower reaction, leading to falls. 3. The elderly have declining skeletal muscle system function and lower limb muscle strength, leading to weakened muscle and joint function and decreased mobility. Therefore, the elderly have unstable gait and weak lower limbs; 4. Social factors are related to falls. Some elderly people are afraid of falling, especially those who have fallen before, walk more carefully, and try not to walk, but lose the opportunity to exercise their muscles. Long-term muscle and coordination decline, leading to the risk of falls; 5, some older people have strong personalities, stubborn and more independent, often overestimating their own abilities leading to falls; 6, environmental factors, the elderly are prone to slip and trip, reminding us that we should pay attention to the safety environment settings to reduce the risk of falls in the elderly.