The pain in the medial tendon of the arch of the foot is considered to be caused by chronic strain injury, plantar fasciitis, congenital clubfoot and other reasons. 1. Chronic strain injury: such as wearing shoes that do not fit the feet, walking for a long time or a lot of exercise and other factors can cause chronic strain injury to the soft tissues of the soles of the feet, which can cause pain in the medial arch muscles. It is recommended to change comfortable shoes in time, exercise reasonably and appropriately in daily life, and avoid exertion. 2. Plantar fasciitis: also known as metatarsal tendonitis, refers to aseptic inflammation of the plantar tendon or fascia, associated with prolonged walking or running, as well as structural anomalies of the foot, such as flat feet, high arched feet, etc. Clinical manifestations of plantar pain, especially when load-bearing or morning inactivity for a long period of time, the pain is more pronounced. Local hot compresses, oral celecoxib and other anti-inflammatory and analgesic drugs can be used as appropriate. 3. Congenital inversion of the foot: one side or both sides of the foot for varying degrees of inversion pendulous deformity, deformity is obvious, most common in males. It is mainly treated by manipulation and surgery. There are many other causes of medial plantar fasciitis, so it is recommended to consult a doctor in time for targeted treatment under the guidance of the doctor.