Any patient suffering from pain may be a candidate for local injection of procaine hydrochloride or other analgesic drug. If the pain arises from muscle or fascia, the injection may dramatically relieve the pain. Necessity for Such Treatment.— Because the pain associated with many conditions has a tendency to decrease or disappear with little or no treatment, many physicians do not realize the number of persons who suffer unnecessary or prolonged pain. Careful follow-up study over a period of years reveals that certain muscle-fascia pains are never completely relieved by conventional methods of therapy and leave residues of weakness, lessened function and liability to recur with less provocation. Pain, formerly supposed to be always protective in nature, actually may harm the organism by (1) preventing full function, i.e., disability due to sprains, (2) causing other muscles to splint protectively the painful area and (3) setting itself up as a nerve