The patient’s foot surface is not swollen, but painful, for the following reasons: a. Dorsalis pedis fasciitis: may be caused by too much sports or weight walking, such as up and down stairs, hiking, can cause the dorsalis pedis fascia by the increased load, the dorsalis pedis fascia will occur strain, aseptic inflammation, so it will be manifested as the pain of the foot surface. Second, the shoes worn are not suitable: for example, wearing shoes that are too small will cause friction between the shoe surface and the dorsum of the foot, resulting in soft tissue damage to the dorsum of the foot, manifesting as pain and discomfort on the surface of the foot. Third, lumbar disc protrusion: when the protruding disc tissue compresses the lumbar 5 nerve root, it will lead to numbness or pain in the back of the foot.