Soreness and weakness of the foot rods may be caused by overwork, anemia, cervical spondylosis, lumbar disc herniation, and so on. 1. Overwork, excessive exercise, incorrect posture, etc. lead to aseptic inflammation and cause soreness and weakness of the foot rods. 2. Anemia: Heavy anemia due to various reasons can cause soreness and weakness of the foot rods. 3. Cervical spondylosis: Cervical spondylosis compresses the spinal cord, resulting in the feeling of stepping on cotton under the feet, and soreness and weakness of the feet. 4. Lumbar disc herniation: Severe lumbar disc herniation can also lead to sore and weak feet. The cause of foot weakness may also be other reasons, such as cerebral infarction, osteoporosis, spinal cord cavity, etc., when there is foot weakness, rest can not be relieved after the first time to the hospital, early diagnosis and early treatment.