By Dr. Jeffrey Peng, MD · Published March 5, 2026 · 8 min read Watch the Full Video Knee pain is not random. Where you feel the pain can serve as a powerful diagnostic clue to the underlying problem. By understanding the source of your symptoms, you can take the appropriate first steps toward recovery. As a board-certified sports medicine physician , I evaluate knee pain every day in my clinic. In this guide, I walk through 15 of the most common causes of knee pain, organize