Symptoms caused by loosened internal fixation of a patella fracture are often localized pain and swelling. Patella fractures that are significantly displaced, or comminuted, require surgical incision and reduction for internal fixation. Commonly used internal fixation methods include Kirschner pins, tension bands and patellar claws, which can effectively immobilize the patella. After internal fixation of patellar fracture, if the internal fixation is loosened due to activity or other reasons, the main symptom caused is that it will lead to pain at the fracture site, especially during activity, the pain will be more obvious, and it may also lead to diffuse swelling around the periphery, which is more serious after activity. If the loosening of the internal fixation of the patella fracture leads to obvious pain or other uncomfortable symptoms, you should go to the hospital in time and take relevant examinations, such as X-ray, to clarify whether there is a loosening of the internal fixation, so as to carry out timely surgical treatment.