Medial foot pain refers to pain in the inner side of the foot, and the possible causes include exertion, trauma, flat feet, plantar fasciitis, etc. 1. Exhaustion: overwork after strenuous exercise, long-distance running, weight-bearing exercise, the medial foot pain is a normal phenomenon, and you can rest appropriately. 2. Trauma: Most people have a history of trauma to the foot, due to the violent action of local ligaments, muscles, tendons and other soft tissue injuries or metatarsophalangeal joint fracture, there may be medial pain in the foot. 3. Flat feet: due to developmental abnormalities, prolonged standing, etc., the arch of the foot becomes shallow, and in serious cases, the arch may disappear, and due to the lack of cushioning effect of the arch, pain may occur after activities. 4. Plantar fasciitis: due to long time walking, long-distance running, hiking, fitness and other activities, causing aseptic inflammation of the plantar fascia, resulting in pain in the foot. Causes of medial foot pain are more reasons, may also be related to diabetes complications, lumbar disc herniation and other diseases, if the symptoms continue to be unrelieved, it is recommended to consult a doctor in a timely manner, to clarify the cause of the disease, and to carry out targeted treatment.