Regarding the severity of osteoarthritis, it is mainly determined by the clinical symptoms of the patient's osteoarthritis. If the osteoarthritis is only manifested by localized pain, and there is no obvious impact on walking, going up stairs, or going downhill, this means that the osteoarthritis is not very severe. However, if the local swelling and pain of the osteoarthritis are very severe, with considerable pain when going up or down stairs, and if there is popping of the joint or symptoms of entrapment, and the joint has already shown obvious deformation affecting the patient's normal functions, then it indicates that the condition is quite severe. In such cases, it is necessary to proactively consider arthroscopic surgery or artificial joint replacement therapy.