One caveat, the more willingness you can muster to be emotionally honesty and courageous, the better this technique will work for you.
We all have issues that we have swept into our so-called "sub-conscious mind." They are not hidden at all really, but we at some point became afraid to look at those beliefs and their precipitate feelings. It felt like a threat to some fragile solution, or work-around, that we had developed for the interim sustainment of our well-being. But eventually the belief becomes more of a problem than a solution and it becomes time to face emotional facts. Having faced the truth of what you are really feeling and believing, that truth can finally set you free. And you will heal if you act on your new understanding of what is more true and spiritually aligned with your Inner Being.
When you are aligned with Truth as your Inner being knows it, the gap between you and You will close and the need for the illness-messenger will end. It will just disappear, because the message will have been received, read, digested and incorporated into a new way of being.
Good Health and Blessings,