Patellar dislocation does not necessarily require surgery. Patellar dislocation should be seen promptly for either manipulative repositioning or surgery, depending on the severity of the condition. Patellar dislocation is a dislocation of the patella out of the femoral trochanter, which may present with redness, swelling, pain, and impaired movement. The first time the patella is dislocated, if there is no bone or cartilaginous free body in the joint, it is usually repositioned by manipulation and immobilized in a cast. If there is bone or cartilaginous free body in the joint or recurrent patellar dislocation, surgical treatments such as lateral knee release and medial patellar ligament reconstruction are needed. After patellar dislocation, you should go to the hospital in time, complete the relevant examinations under the guidance of the doctor to determine whether surgical treatment is needed.