Bicycling knee pain may be due to a variety of reasons, such as knee trauma, joint inflammation, chondromalacia patellae, etc., and it is necessary to improve the auxiliary examination to clarify the cause of the disease. 1. Trauma: there is a clear history of trauma, resulting in knee ligament strain, meniscus injury, joint capsule injury and joint fracture, etc., in the process of cycling, resulting in further aggravation of the already damaged parts, so there will be pain. 2. Inflammation of knee joints: the more common are knee joint traumatic arthritis, osteoarthritis, rheumatism, rheumatoid arthritis, and gouty arthritis, etc. The knee joints are painful, and bicycling leads to further wear and tear of the joints, which aggravates the pain. 3. Chondromalacia patella: It is mainly caused by chronic strain injury and trauma to the knee joint, which leads to further aggravation of knee pain when riding a bicycle. It is recommended to go to the hospital, combined with the knee CT, MRI and other tests, to clarify the cause of the disease, and then given appropriate treatment by a professional physician.