Platelet-Rich Plasma (#PRP) injections are a relatively new treatment that using your own blood to help knee pain and promote healing responses for a number of other musculoskeletal issues. What Is a PRP Treatment? Platelet-Rich Plasma is a type of therapy that uses the self-healing properties of the body to help it repair damaged ligaments and help pain with arthritis. The treatment involves drawing a small quantity of your blood and spinning it in a centrifuge to separate