Steve Harvey CBD Gummies And occasionally following a mastectomy, an unusual growth of tissue, known as a neuroma, develops. (Neuromas broaden after other sorts of surgeries as nicely.) Neuromas are usually benign. But as the ordinary tissue grows and thickens, it may reason serve nerve pain. Adhesions After mastectomy surgery (or any type of surgical treatment), adhesions, additionally called scar tissue, shape along the surgical wound. This is the body's everyday reaction and the first step in healing.