The knee pain location chart lists all the painful areas of the knees and can help you and your doctor pinpoint the exact area that is causing the knee pain. The knee is a synovial hinge joint supplied with synovial fluid to lubricate movement and move the knee back and forth like a hinge. It is a complex body part of the bone, cartilage, muscle, tendon, ligament, synovial fluid, and nerves. Depending on where you're experiencing the pain in your knee is determined by the area it's affecting. For example, if you're suffering from pain on either side of your knee cap, it could be arthritis or a meniscus or ligament tear.