When your knee hurts, getting relief is all that’s on your mind. Getting the right relief, though, depends on knowing what’s wrong. The correct diagnosis will lead to the correct treatment.Know Your Knee!The knee is the largest joint in the body. It’s also one of the most complicated. The knee joint is made up of four bones that are connected by muscles, ligaments, and tendons. The femur (large thigh bone) interacts with the two shin bones, the tibia (the larger one) located towards the insi.