Scar tissue is a result of repairing your body after initial surgery, reconstructive surgery, or radiation fibrosis. The collagen that repairs the area forms a different pattern than the original fibers of the skin and muscles that were there originally. That can result in tightness and pain, and a reduced range of motion after treatment.
It is important to massage scars and adhesions as soon as the incision has healed. The massage may be a gentle self-massage, or from a massage therapist or physical therapist trained in scar tissue massage. It should be gentle and carefully done to slowly release the adhesions.