Soreness in the arch of the foot may be caused by physiological reasons such as high exercise intensity and thin soles, or it may be caused by pathologic factors such as plantar fasciitis and abnormalities in the arch of the foot. 1. Physiological reasons: the arch of the foot is made up of tarsal bones, metatarsal bones and other bony structures, surrounded by plantar ligaments, tendons and other soft tissues attached to the foot, if the usual amount of exercise is relatively large, it may cause an increase in bone impact or friction in the arch of the foot, fatigue of the soft tissues, and the symptom of soreness in the arch of the foot after exercise. If the sole of the shoes is thin during exercise, the protection of the foot arch is not enough, the above symptoms may also occur. 2. Pathological factors: prolonged heavy physical activity, the body does not get proper rest and repair, which may lead to the emergence of local aseptic inflammation, causing pain, common diseases such as plantar fasciitis, bursitis and so on. When congenital or acquired factors cause abnormalities of the foot arch, it will cause abnormal pulling stimulation of the foot arch during exercise, and the above symptoms may also occur, such as flat feet, inverted feet, etc. There may be other reasons for the soreness of the arch of the foot in sports, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.