Tumors, both benign and malignant, can develop on the lower legs. Benign tumors such as lipomas or sebaceous cysts can develop on the human leg, and these tumors usually occur on the skin or fat. Lipomas are usually asymptomatic in the early stages, but as the tumor grows in size, it can cause localized unevenness and pain in the affected area. Sebaceous cysts are also asymptomatic in the early stages, but may become painful as they grow. Some malignant tumors can also appear in the lower leg, such as chondrosarcoma and bone cancer. Malignant tumors in the leg will cause patients to experience localized swelling and pain, restriction of movement, etc., and the symptoms will gradually become more serious with the development of the disease. In the event of calf discomfort, one should go to the hospital for examination in time to clarify the cause of the disease and then treat the symptoms.