Tumors can grow on the feet, not only benign tumors, but also malignant tumors can appear on the feet. Except for teeth, hair, nails and other parts of the human body that do not grow tumors, all other parts of the body may grow various benign or malignant tumors. The human foot is mainly composed of bone, skin, blood vessels and connective tissue, etc. The benign tumors that appear in the foot are mainly bone cysts from bone, moles from skin, hemangiomas from blood vessels and lipomas from connective tissue. The most common malignant tumors that occur in the feet are malignant melanoma of the skin, osteosarcoma, smooth muscle sarcoma of the blood vessels, and liposarcoma of the adipose tissue, etc. Among them, malignant melanoma often occurs in the skin of the soles of the feet, with rapid growth and high malignancy, and the prognosis of patients is very poor and the survival rate is very low. Osteosarcoma is common in the ankle joint or metatarsal bone, mostly occurs in adolescents, and becomes an important cause of disability.