Pain in the medial arch of the foot is mainly caused by the following reasons: 1, it may be that the shoes are not suitable, and the friction between the position of the medial arch of the foot and the position of the sole increases after walking more, which will lead to serious skin irritation for a long time, forming inflammatory edema of the skin, thus stimulating the peripheral nerve and causing pain in the medial arch of the foot; 2, too much walking, strenuous exercise, and long distance walking may lead to the bit of the medial arch of the foot Muscles, tendons, ligaments, fascia and other soft tissues continue to be in a state of tension and fatigue, gradually forming strain injury. Inflammatory lesions are produced, resulting in pain in the medial arch of the foot; 3, it may be flat feet, because flat feet are prone to strain in the medial foot and plantar position, resulting in pain in the medial arch of the foot when walking more and getting cold; 4, jumping from a high place, when landing on the ground, the muscle tissue is violently contracted, resulting in pain due to muscle tissue strain.