1, unexplained knee pain, not red, not swollen, and only upstairs pain or downstairs pain, this is often a patellofemoral joint surface problems, commonly known as cartilage surface roughness, at this time, if timely treatment, proper method, patients often within 1 week or even shorter time symptoms disappear. However, most patients often come to the doctor only after a month, two months or even half a year of pain, so, as you can imagine, the initial roughness of the cartilage surface becomes uneven over time due to lack of proper treatment, and the opportunity for early treatment is obviously lost. For this reason, we call on all patients with knee pain to visit a joint specialist as early as possible to avoid receiving informal treatment and delaying the best treatment. Li Anping, Department of Joint Surgery, Hainan Provincial People’s Hospital 2. The so-called best time for treatment is early treatment, standardized treatment and effective treatment. Early knee pain (within 1 month), should be timely supplemented with joint nutrient fluid, currently the clinical common use of domestic or imported hyaluronic acid, commonly known as joint lubricant. Generally, intra-articular injections are given once a week for a course of 3-5 weeks, while oral cartilage supplements are used for better results. The entire course of treatment is about 1 to 2 months. For those with a disease duration greater than 1 month and less than 1 year, it is often attributed to mid-term knee pain, mostly due to the evolution of neglecting early treatment. Treatment is still preferred with intra-articular lubricant injections and oral cartilage supplements, but the course of treatment will be extended accordingly. After the above treatment, for some joints with swelling and friction sounds, and the symptoms have not improved, at this time, arthroscopic minimally invasive cleanup should be used promptly, and most patients can obtain satisfactory results. 3.For elderly patients with a disease duration of up to 1 year or even longer, different surgical interventions can still be selected according to the imaging performance, thus delaying the further destruction of the articular cartilage surface, commonly including brace wearing of corrective force lines, surgical correction and surface replacement of the articular surface. 4, In addition to the above formal treatment, patients should also avoid sports and lifestyle habits that aggravate joint wear, such as prohibiting climbing, climbing and squatting; prohibiting tai chi, and instead replacing it with walking, swimming or non-weight bearing knee exercises, such as pedaling in place.