Medically reviewed by Amy Kwan, PT Key Takeaways Patellar tendonitis happens when the tendon becomes inflamed and irritated. Resting and avoiding activities that cause pain in the knee is important ...

If you have not already done so, you may want to watch What is Causing Your Knee Pain? Patellofemoral Pain Syndrome or Kneecap Pain? How to tell? These 5 stretches are designed to help most types of ...