Knee tightness one month after patellar fracture surgery can be treated with active, or passive, rehabilitation exercises under the direction of your doctor. Knee tightness one month after patellar fracture is mainly caused by long-term braking, or the placement of internal fixation. If the tightness is caused by the placement of internal fixation after surgery, it can be relieved after adaptation. If the tightness is due to prolonged braking, active or passive rehabilitation exercises should be performed under the supervision of the surgeon. If rehabilitation is not effective, surgical release may also be used. It is important to note that after knee surgery, functional exercises for the knee joint should be carried out at an early stage under the guidance of the doctor. Avoid complications such as knee stiffness caused by long-term braking.