Most knee pain in the elderly is caused by degenerative osteoarthritis of the knee joint, which can be treated as follows: First, physical therapy, either microwave physical therapy or far-infrared physical therapy, can be used to relieve knee pain. Second, oral medication, oral anti-inflammatory and analgesic drugs, such as meloxicam and celecoxib, as well as drugs that nourish cartilage, such as glucosamine hydrochloride and glucosamine sulfate, can be taken orally. Thirdly, oral Chinese medicines can be taken, such as Guaqi Zhuangbao granules and anti-bone growth tablets. If the osteoarthritis of the knee is more serious, intra-articular injection can be performed, for example, intra-articular injection of sodium vitrate, which is also very good for the treatment of pain caused by arthritis and treatment, if there are fixed pressure points around the knee joint, local closure treatment can be performed.