The method of correcting a medial knee bulge needs to be chosen based on its underlying cause, which mainly includes conservative treatments such as physical therapy and surgical treatments such as joint replacement. In case of hard medial knee protrusion due to bony causes such as osteophytes, it is common to consider ways such as artificial joint replacement surgery to remove the excess bone and utilize a prosthesis to replace it in order to improve joint mobility and reduce pain. In case of meniscal cysts and other tissue causes of medial knee protrusion, the joint can be improved through physical therapy such as hot compresses, massage, and other conservative treatments such as bed rest and reduced activities. In conclusion, medial knee bulge is usually caused by a variety of causes, when the situation is serious, you should immediately seek medical attention to clarify the diagnosis, so as to choose the appropriate treatment to deal with.