Knee pain is the most common musculoskeletal complaint that brings people to their doctor. With today’s increasing active society, the number of knee problems is increasing. The knee joint’s main function is to bend, straighten, and bear the weight of the body along with the ankles and hips. The knee, more than just a simple hinged joint, however also twists and rotates. In order to perform all of these actions and to support the entire body, the knee relies on a number of structures including bones, ligaments, tendons, and cartilage. Three bones meet to form your knee joint: your thighbone (femur), shinbone (tibia), and kneecap (patella). Bones are connected to other bones by ligaments. You have four primary ligaments in your knee (Anterior cruciate ligament, posterior cruciate ligament, medial collateral ligament, lateral collateral ligament) that act like strong ropes to hold the bones together and keep your knee stable. Knee pain may start suddenly, often after an injury or exercise.