Pain in the ball of the foot cannot simply be summarized in four diseases. Generally speaking, pain in the ball of the foot may be caused by physiological factors such as walking or running too much, or it may be caused by pathological factors such as flat feet, trauma and fasciitis. 1. Physiological factors: if the exercise time is too long or walking or running too much, beyond their own body load, the soft tissues of the feet produce fatigue, then the phenomenon of pain in the soles of the feet, which is a normal physiological phenomenon, and can be recovered by sufficient rest. 2. Flat feet: that is, flat foot syndrome, due to congenital factors, trauma and other factors caused by the collapse of the medial longitudinal arch deformity of the foot, walking more or loaded can appear after the symptoms of ankle and foot pain. 3. Trauma: Trauma can lead to soft tissue injuries such as plantar muscles, or even fractures of the foot, which can cause pain in the ball of the foot, accompanied by localized swelling and impaired mobility. 4. Fasciitis: due to trauma, chronic strain injury, etc. can lead to aseptic inflammation of the soles of the feet, causing plantar fasciitis, which can cause pain in the soles of the feet, and the pain is aggravated by activities. Foot pain may also be caused by other reasons, such as bone tumors, gout and other diseases, if the rest of the symptoms continue to be unrelieved, it is recommended that patients go to the hospital in a timely manner, to identify the cause of the targeted treatment.