Painful symptoms appear on the bottom of the foot according to the following common causes: first, flatfoot syndrome and other diseases, such diseases will make the plantar muscles atrophy and severe strain, there will be obvious painful symptoms when pressing the bottom of the foot, most of them are soreness and swelling. The height of the arch of the patient will be significantly reduced, and taking X-rays can confirm the diagnosis. Second, plantar trauma, such as muscle and fascia strains, can lead to local pressure pain symptoms, and in most cases the history of trauma is clear. Third, plantar plantar fasciitis, which belongs to a kind of heel pain, is a chronic accumulative inflammatory lesion. The pain is most obvious when the patient wakes up in the morning just after the foot hits the ground.