Platelet rich plasma treatment or PRP is another excellent form of injection therapy that is used to relieve pain. First, blood is collected from the patient. This blood is then separated so that plasma and platelets can be extracted. Platelets are a component of blood responsible for tissue repair. By taking the plasma and platelets and concentrating them, our doctors can direct them via injection to a specific site. This method of treatment uses the body’s own signaling and process for healing to relieve pain. Many different forms of pain in a variety of body parts can be treated with PRP.