In my article “A Brief Analysis of the Causes and Management of Postoperative N-Fossa Pain in the Knee” a while back, one of the points I made was the pain caused by micro-motion failure of the upper tibiofibular joint. Today, I would like to briefly introduce to you, the loosening maneuver of the upper tibiofibular joint. The superior tibiofibular joint is a small, unobtrusive joint on the lateral side of the knee underneath the posterior side, which normally does not undergo large joint movements and undergoes micromotion during large angular flexion of the knee. After knee surgery, there is a risk that the mobility of the upper tibiofibular joint may be involved due to prolonged limitation of knee mobility, resulting in pain in this location during knee flexion. For loosening of the upper tibiofibular joint, a 3-4 level maneuver in traditional arthrodesis is sufficient. It is important to note that in the upper tibiofibular joint, the fibula and tibia are not simply parallel to each other, but there is an angle of about 45°. So in the process of loosening, pay attention to the direction! Also, as the peroneal nerve travels around the fibular tuberosity, extra care should be taken during the operation.