When a patient walks with a rattling sound in the knee, most of the time this is caused by friction between the ligaments and cartilage in the knee joint when the patient flexes and extends the knee. If there is a ringing sound, but there is no pain, the patient can be treated without special treatment and can be observed regularly. If the patient has a popping knee joint with pain during activity, symptomatic treatment is indicated. Conservative treatment can be given by applying heat to the knee joint, fumigation with Chinese herbs or acupuncture, moxibustion, etc. It can also be combined with physiotherapy baking, bioelectric therapy, etc., or by injecting sodium vitrate into the knee joint, which can nourish the cartilage and synovial membrane, which can significantly relieve the pain.