There can be several causes of pain on the upper side of the knee: first, synovitis, when there is inflammation of the synovial membrane of the suprapatellar bursa of the knee joint, there can be pain at the bursa above the knee, which can be accompanied by significant fluid accumulation as well as significant limitation of joint movement and joint swelling, it is important to check the body early and check the MRI of the knee early to identify the cause and treat according to the cause. Second, quadriceps tendonitis, patients with quadriceps tendonitis can have pain in the quadriceps tendon above the knee, which should be diagnosed by early physical examination and early MRI of the knee joint. Third, osteophytes of the patella, when the upper pole of the patella has bone spur formation, there can also be pain above the knee, then early examination of the X-ray and CT of the patella, early oral medication and physical therapy.