The frost has passed and the weather becomes colder into winter. When people put on thick clothes and pants, their movements become much slower, and when it rains or snows, the road is slippery and pedestrians walking or cycling are prone to fall. Professor Zhang Yong from the orthopedic department of Tangdu Hospital of the Fourth Military Medical University told reporters that in winter, especially after rain and snow, the orthopedic department sees many more injured people than usual. For the elderly with limited mobility, it is especially important to pay attention to safety when traveling in rain and snow. After rain and snowfall, it is best to minimize travel for the elderly. For those who must go out, they should be accompanied by family members or use a “three-legged cane” as an assistant to prevent falls, and to keep their movements small and not to walk too fast. The elderly have osteoporosis and are prone to fractures in three places after a fall. People who are older have weaker body coordination and are at a much higher risk of falling than younger people. In particular, the elderly are more osteoporotic and are prone to fractures in three areas after an accidental fall: 1. Wrist fractures: when a person is about to fall, he or she will reflexively reach out and touch the palm of the hand to support the body for protection. 2. Vertebral fractures: they occur mostly in the lumbar spine and the vertebrae of the thoracolumbar region of the spine. When osteoporosis occurs in humans, the vertebral body of the spine is often involved first, so that the number of supporting bone trabeculae in the vertebral body becomes reduced and the quality of the structure becomes weak. Zhang Yong said that in severe cases, the vertebral body is like an empty house without pillar support, with four walls. Once stimulated by external forces, such as the occurrence of a fall injury, the loose and empty vertebral body is prone to morphological changes, namely vertebral compression fractures. 3. Hip fracture: The hip is the connection between the lower limb and the trunk. The moment a person falls, the force of lower limb support and twisting will act like a lever on the hip, and the osteoporotic elderly will easily cause fracture of the femoral trochanter or femoral neck.