In our clinic, we see many patients who have been suffering from joint pain for a long time and do not come to see the doctor, but only go to the hospital when the pain becomes unbearable. When we do arthroscopic surgery, we will find that the intra-articular lesions have already developed to a very serious degree, and we always lament: if we had come to see them earlier, the surgical effect would have been better. What are the diseases that can cause knee pain? Generally speaking, they include joint injurious lesions and inflammatory lesions. Joint injuries can be sports injuries or accidental injuries, but there are also some patients who have no obvious history of trauma, and their joint pain is often due to an accumulation of minor injuries that can be easily overlooked, which may injure tissues such as meniscus, articular cartilage, ligaments, and so on. Inflammatory lesions involve a wider range of diseases, such as rheumatic, rheumatoid, gouty, traumatic, degenerative, tuberculous, septic and other types of arthritis, including ankylosing spondylitis, seronegative spondyloarthropathies and so on. Meng Chunqing, Department of Orthopedics, Wuhan Union Medical College Hospital No matter what kind of disease you have, if you can do early intervention and early control, the treatment effect will be twice as effective. Delayed treatment may cause secondary lesions and affect the treatment effect. Please pay attention to this.