Artificial knee replacement is an effective treatment for most of the degenerative osteoarthritis elderly patients, most of the patients have significant improvement in pain after the operation, some patients can have leg swelling after the operation, according to the different causes, the treatment methods are also different, as follows: 1, local adhesion or poor circulation, resulting in edema, it is recommended to use to eliminate adhesion, improve the circulation of the treatment, such as local physiotherapy, relaxation of muscle shock wave Treatment; 2. If it is caused by varicose veins, lymphatic circulation or increased muscle tension, which affects the blood circulation, it is necessary to treat the area above the knee joint or the following calf area to improve the overall circulation. If the patient has swelling in both legs, in addition to considering localized problems in the knee, it is also necessary to consider the presence of diseases of the kidneys, heart and systemic organs.