Swelling and pain on the soles of the feet can be caused by the following causes: first, tumor on the soles of the feet, when there is a tumor on the soft tissues or bones of the soles of the feet, there can be local swelling and pain, and there can be obvious pressure and pain, and the lump or swelling can be touched, then we should check the body at an early stage, and check the CT of the feet as well as the MRI of the feet to make an early diagnosis and treatment; second, gout on the soles of the feet, when the gout has affected the joints or soft tissues of the soles of the feet, there can be swelling and pain, accompanied by skin redness and increased skin temperature, and in severe cases, there can be gout stone formation. Second, gout on the sole of the foot, when gout involves the joints or soft tissues of the sole of the foot, there can be symptoms of swelling and pain, accompanied by redness of the skin and increased skin temperature, and in severe cases, there can be the formation of gout stones, which should be diagnosed by checking blood tests and taking X-ray films of the feet; third, tendon sheath cysts, when there are tendon sheath cysts on the sole of the foot, there can be swelling and pain on the sole of the foot, and cystic swellings can be palpated, which should be diagnosed by checking color ultrasound and magnetic resonance imaging; fourth, giant cell tumors in tendons, when tendon Fourth, giant cell tumor of tendon, when the tendon has giant cell tumor growth can also have swelling and pain, can be accompanied by the formation of swelling, this time to check the MRI to diagnose; Fifth, infection, when there is a bacterial infection or tuberculosis infection on the soles of the feet, there can be swelling and pain, can be accompanied by the redness of the skin, this time to test blood and check the feet of the MRI to diagnose.