The pain above the knee can be caused by several reasons: 1, quadriceps tendonitis, quadriceps tendon common in long-term sports athletes or patients walking long distances, which can lead to chronic injury to the quadriceps tendon, and inflammatory pain, this time to early examination, check the knee MRI to diagnose and early treatment; 2, bursitis, when the patellar bursa on the knee joint has inflammation Bursitis, such as rheumatoid, tuberculosis, gout secondary bursitis or bursitis due to strain or cold, can cause pain in the upper bursa of the knee, accompanied by swelling and limited joint movement. In this case, we should check the ultrasound and MRI of the knee joint for early diagnosis; 3. Synovial tumor, when there is a tumor in the synovial membrane of the bursa, there can also be pain above the knee, then we should check the MRI and do pathological examination for early diagnosis;