The following causes are common: First, the patient has flat feet and the arch collapses so that the longitudinal arch of the foot is severely stretched, and the patient will have obvious painful symptoms in the plantar muscles. If orthopedic shoes are used to cushion the arch, the pain symptoms can be relieved quickly, and the foot X-ray can confirm the arch abnormality. Secondly, plantar fascial inflammation, the plantar fascia ends at the heel node, which can maintain the longitudinal arch of the foot, and inflammation will occur when subjected to prolonged strain and pressure, thus causing plantar pain symptoms. The symptoms will be obvious when walking, and the local pain point is usually more definite when pressed, and the clinical symptoms can be relieved quickly by using extracorporeal shock wave treatment or closed injection. Therefore, it is necessary to identify the cause of the pain on the bottom of the foot, and to treat the cause in order to achieve the best results.