The weakness of the feet of the elderly is commonly caused by the following four conditions: First, central nervous system lesions, such as cerebral infarction, cerebral hemorrhage and other cerebrovascular diseases, need to take some drugs to improve brain cell metabolism, improve brain circulation and nerve nutrition, such as cytarabine tablets, cerebral protein hydrolysate, ginkgo biloba, cerebral heart pass, blood plug pass, methylcobalamin, vitamin B1, etc. Second, lumbar spine lesions, lumbar disc herniation, lumbar compression fracture can lead to nerve compression, and the lower limbs are sore and weak, etc. You need to do some lumbar physical therapy, including lumbar hot compress, pack Chinese medicine to improve the blood circulation of the lumbar region, and also take some Chinese medicine to nourish the liver and kidney, strengthen the tendons and bones, such as Xian Ling Bone Program, Jin Tian Ge capsule, etc. Third, hypokalemia, hypokalemia patients, will also appear lower limb weakness and even general weakness, it is necessary to replenish potassium treatment, take potassium chloride extended-release tablets or eat more food containing high potassium, such as oranges, bananas, etc. Fourth, the elderly osteoporosis, osteoporosis patients will also appear the whole body pain, lower limb weakness, then need anti-osteoporosis treatment, taking calcium carbonate, vitamin D and other calcium supplementation treatment.