RhoGam is a vaccine like globulin shot that was developed in the late 1960s to keep a Rh negative woman from becoming sensitized to the Rh positive blood of her fetus in the unlikely event blood mixing occurs. Rhogam works very much like an immunization.
However, some new research has shown that TENS may be effective for reducing pain in people who have fibromyalgia, especially in combination with other treatments, such as exercise. Fibromyalgia is often treated with various medications to relieve pain and improve sleep.
Sorry he's having so much pain. The reason that you should NOT use a TENS unit or have ultra sound when you have mets is because it stimulates and causes cell growth for healing. But it can't tell the difference between the good and bad cells so it also can stimulate cancer cells.