The following causes are common: 1. severe strain on the muscles of the lower extremities, especially the foot muscles, related to excessive weight bearing or excessive exercise, the patient will experience foot pain and weakness and cannot walk normally with weight, requiring rest and hot compress treatment to relieve the symptoms. 2. severe cervical disc herniation, cervical spinal stenosis, and lumbar spinal stenosis, can compress the nerves The patient will have clinical symptoms of weakness and soreness of the foot, which may be accompanied by limitation of spinal movement and spinal pain, and some patients will also have urinary and fecal dysfunction. After CT and MRI examinations, the exact location and extent of the lesion can be detected. Early diagnosis and treatment can lead to rapid relief of clinical symptoms of foot weakness. If treatment is delayed, resulting in degenerative necrosis of the nerve, the symptoms are usually difficult to cure and the patient’s normal life and movement can be seriously affected.