The cause is thought to be repetitive, excessive pulling by the tendon of the kneecap (patellar tendon) on its point of attachment at the top of the shinbone (tibial tubercle) X-ray studies of the knee may show the tibial tubercle has enlarged or has broken into fragments. However, x-ray studies are not needed unless pain and swelling extend beyond the area over the tibial tubercle or unless pain is accompanied by redness and warmth. Avoiding sports and excessive exercise helps reduce pain. Avoiding deep knee bending is particularly helpful.

The cause is thought to be repetitive, excessive pulling by the tendon of the kneecap (patellar tendon) on its point of attachment at the top of the shinbone (tibial tubercle)

X-ray studies of the knee may show the tibial tubercle has enlarged or has broken into fragments. Avoiding sports and excessive exercise helps reduce pain. Avoiding deep knee bending is particularly helpful.