There's a bump on the calf bone.

There are two kinds of protrusion in leg bone: one is bone mass derived from bone. Common are benign tumors such as osteochondroma and osteoma, in addition to bone cyst and osteosarcoma; two is caused by soft tissue mass close to bone, which feels like bone mass of leg, such as tendon sheath cyst, lipoma or calcification caused by traumatic hematoma. These conditions are easy to cause bone protrusion in leg. Showing such symptoms, it is recommended to go to the hospital in time to take X-ray examination, accurately determine what nature of the mass, and then make corresponding treatment plan according to the nature of the mass.