In the clinic, when the patient has the phenomenon of ringing sound when extending and flexing the knee and accompanied by pain, it may be due to the patient’s knee joint endoskeleton hyperplasia, degeneration, resulting in osteoarthritis of the knee joint, there is a narrowing of the joint space, and when extending and flexing the knee joint, due to the friction of the cartilage, resulting in ringing sound and accompanied by pain. After the patient suffers from this disease, the patient can be instructed to take oral anti-osteoporosis drugs, such as oral anti-osteoporosis tablets, Jinlong Pill, osteoarthritis and other drugs, can also be taken orally to take chondroitin hydrochloride, which can play a role in nourishing the cartilage so that the cartilage has the role of anti-wear and tear, and can accelerate the blood circulation of the knee joint area. In addition, if the patient’s pain is more serious, you can also instruct the patient to take non-steroidal anti-inflammatory analgesic drugs, such as oral fenbid, diclofenac sodium and other drugs, can make the clinical symptoms get relief.