Patella fracture is still painful two months after surgery, case by case analysis, the common causes are delayed fracture healing, surgical trauma, irritation of internal fixation and so on. 1. Delayed healing of fracture: 2 months after surgery, the broken end of the fracture may not be fully recovered, thus causing pain. 2. Surgical injury: surgery itself is a kind of trauma, and there may be bruising, bruising after a certain period of time to absorb, which may cause pain. 3. Stimulation of internal fixation: especially after wire fixation with Kirschner’s pin, the end of the pin stimulates the soft tissues, which leads to still pain after operation. If the patella fracture is still painful two months after the operation, it is recommended to go to the hospital in time, under the guidance of the doctor for standardized treatment.