Leg weakness in 88-year-old people may be caused by calcium deficiency and osteoporosis, or it may be caused by arteriosclerosis occlusive disease of the lower limbs, or it may be caused by lumbar spinal stenosis, which needs to be handled differently according to different causes. 1. Elderly people are prone to calcium deficiency leading to osteoporosis, in which case, in addition to leg weakness, other symptoms such as pain in the lumbar back and limbs, and spinal deformity may occur. Treatment should be supplemented with sufficient calcium and vitamin D to promote calcium absorption and alleviate osteoporosis, and falls should be prevented to prevent fragility fractures. 2. 88-year-olds with lower limb arteriosclerosis may also suffer from leg weakness, which is caused by occlusion of the arterial vessels in the lower limbs and insufficient blood supply to the lower limbs. The disease occurs in patients with diabetes, hypertension, hyperlipidemia and other diseases, these patients will also appear lower extremity skin temperature reduction, thin skin, hair loss and other symptoms, treatment can be used simvastatin, aspirin, clopidogrel and other drugs for treatment. 3. lumbar spinal stenosis of 88 years old can also appear leg weakness symptoms, this is due to age, lumbar degeneration, treatment should be bed rest, reduce exercise, but also the use of ibuprofen, methylprednisolone, vitamin B, methylcobalamin, and other drugs for treatment, for serious patients, but also can be carried out spinal decompression surgery to treat. In addition to the factors listed above, diseases such as myasthenia gravis may also cause the elderly to feel weak in the legs, and they should consult the doctor in time to find out the causes so as not to delay their condition.