As with all cases of tendonitis, patellar tendonitis is simply the inflammation, degeneration or rupture of the patellar ligament and the tissue that surround it, leading to pain and discomfort in the area just below the knee cap.
Overuse is the major cause of patellar tendonitis. Activities that involve a lot of jumping or rapid change of direction are particularly stressful to the patellar ligament. Participants of basketball, volleyball, soccer, and other running related sports are particularly vulnerable to patellar tendonitis.
Patellar tendonitis can also be caused by a sudden, unexpected injury like a fall. Landing heavily on your knees can damage the patellar ligament, which can lead to patellar tendonitis.
The major symptom of patellar tendonitis is pain in the area just below the kneecap. Activities like walking, running and especially squatting, kneeling or jumping will cause increased pain and discomfort. Swelling is also commonly associated with patellar tendonitis.
Be aware of the importance of good footwear. A good pair of shoes will help to keep your knees stable, provide adequate cushioning, and support your knees and lower leg during the running or walking motion
For more information on Knee pain or ITB opain, see the ITB section under Foot Conditions