Pain in the sole of the foot may be caused by physiological factors such as prolonged standing and wearing ill-fitting shoes. It may also be caused by plantar fasciitis, heel bone spurs, heel fat pad inflammation, Achilles tendonitis, heel trauma, gout and other pathological factors. 1. Physiological factors: When standing for a long time or wearing ill-fitting shoes, the soft tissues of the heel will be stimulated and the pain will be triggered, which can be improved through rest and self-conditioning. 2. Plantar fasciitis: When walking for a long time, the plantar fascia will be stimulated repeatedly, which will form aseptic inflammation and cause pain. 3. Heel bone spurs: after the heel is repeatedly stimulated, it will trigger heel bone hyperplasia and degenerative changes, which will involve the surrounding soft tissues and cause pain. 4. Heel fat pad inflammation: there are abundant fat pads distributed in the heel area, which can cause aseptic inflammation under the influence of factors such as cold, exertion, and prolonged walking. 5. Achilles tendonitis: the Achilles tendon is attached to the heel bone area at its stopping point. After excessive activities, the attachment point of the Achilles tendon will show inflammatory reactions such as oozing and edema, which will also cause pain. 6. Heel trauma: soft tissue contusion or even fracture at the root of the foot, resulting in congestion, edema and restricted movement, which may cause pain. 7. Gout: When the purine metabolites in the body produce too much, uric acid is deposited in the heel, which will cause redness, swelling and pain. After the pain in the sole of the foot, if it can not be improved through self-conditioning, and the pain is aggravated, you should consult a doctor in time to clarify the cause of the disease, and follow the doctor’s instructions for treatment.