Medial knee bulge is often caused by different reasons, correction methods will be different, as follows: 1, osteophytes: elderly patients with medial knee bulge is often caused by osteophytes, joint degeneration, bone spur formation around the joint will be manifested as a hard medial knee bulge, generally to artificial joint replacement surgery. In the replacement surgery, the bone can be completely removed, and then replaced with artificial joint prosthesis, can improve pain, improve joint function; 2, meniscal cysts: can be conservative treatment, such as local hot compresses, can be rubbed massage on the inside of the knee, minimize strenuous sports activities, long walking, general meniscal cysts can be self-absorption.