Hello, thanks for using HCM. With a history of knee trauma, it is most likely that what you are experiencing now is a continuation or a complication of the trauma you had. The knee is made up of bones, ligaments, tendons, meniscus, bursa etc all of which can be involved in a knee trauma. Affections related to bones, ligaments and tendons turn to be more acute with symptoms such as pain and swellings. However, meniscal lesions turn to evolve over time. Trauma predisposes to Osteoarthritis (a degenerative joint disease) which results from a slow but continuous erosion of the articular surfaces causing pain, crepitus and sometimes knee imbalance. However, all these are hypothesis and only after an appropriate clinical evaluation by a Physician and possible tests (x-ray, ESR ) will give a precise answer. Best regards.