There are many reasons for the weakness of legs, including calcium deficiency, cervical spondylosis, lumbar spondylosis, cerebrovascular disease, etc. The treatments include physical therapy, medication and surgery. 1. Calcium deficiency: If there is a prolonged calcium deficiency, it may cause the body’s muscle tone to decrease, and symptoms such as weakness, soreness and numbness of the lower limbs may occur. The above symptoms can be improved by supplementing vitamin D and so on. 2. Cervical spondylosis: For example, if spinal cervical spondylosis, if bilateral spinal cord is compressed, it may lead to pain, numbness and weakness of the lower limbs, which may lead to movement disorders. Symptoms can be relieved by applying nerve-nourishing drugs such as methylcobalamin and vitamin B12, and surgical treatment can be taken if necessary. 3. Lumbar spondylosis: If the lumbar disc herniation compresses the nerves, the above manifestations may occur. Symptoms can be relieved by acupuncture, massage, heat and magnetic physiotherapy. If non-surgical treatment is ineffective, surgical treatment such as minimally invasive spinal endoscopic treatment can be adopted. In addition to the above reasons, cerebrovascular disease (such as cerebral infarction, cerebral thrombosis, etc.) can also cause the above symptoms. If the symptoms are not relieved, or accompanied by other symptoms, you should go to the hospital in a timely manner to identify the cause and give targeted treatment.