What could cause knee pain when moving it in a particular way?

Sometimes when you move your knee in a particular way, it hurts because different parts of the knee are not working as they should. One reason is osteoarthritis, where the smooth cartilage that helps your bones glide and move easily gets rough and worn out. This makes movements painful. Another possibility is that a ligament or a meniscus, the cushiony tissue between bones, gets injured or torn. These tissues help keep the knee stable, and when they are hurt, certain movements can cause pain. Also, the area behind your knee cap (known as the patellofemoral joint) can be a source of pain if the muscles or cartilage around it are weak or overused. Lastly, inflammation in the tendons or other soft tissues around the knee can make specific motions very painful. Understanding the exact cause usually requires a careful look at your symptoms and sometimes studies like imaging tests, so taking a free symptom checker quiz can help you identify potential causes before speaking with your doctor about persistent knee pain.