At this stage, artificial joint replacement surgery is an effective means of treating advanced joint disease. However, many patients are not clear about when to approach a joint surgeon for this type of surgery. We are here to introduce you to a popular foreign method of self-assessment. 1. Do you feel pain in your joints one or more days a week? 2.Does the joint pain already affect your sleep? 3.Do you start to experience joint pain after walking more than 100 meters? 4.Are anti-inflammatory and pain medications not effective? 5.Is your daily life significantly limited? 6.Did you gain weight because the pain made you less active? 7.Can you temporarily reduce your activities for a few months for post-operative rehabilitation? 8.Can you actively cooperate with the doctor to complete the rehabilitation program during the post-operative rehabilitation period? If you answered yes to one of these questions, then you should see your joint surgeon to discuss the possibility of an artificial joint replacement.