Abstract: A plurality of arms is pivotally mounted on a support so that the arms may be moved simultaneously towards a central axis to produce a continuously increasing and radially symmetrical force of substantially the same magnitude at each of a plurality of points around an area of the human body having scar tissue so that precisely controlled opposed forces are produced. The arms can have their force exerting plane changed through their mounting arrangement on a carrier, which is mounted for horizontal sliding movement above the patient. The carrier is mounted on support means, which can be moved vertically to move the engaging arms into engagement with the area having the scar tissue.