liver stones (gall stones) and kidney stones are not the same thing. Believe me you'll know the difference.
Gall stones are removed with the Liver Flush and come out in the bm. kidney stones are usually calcified, and come out with the urine. Even very small pieces can be very painful. I'm not sure which flush you're following, but the Hulda Clark flush is supposed to dissolve them. If it does, then it's the only I know of that does. kidney stones usually have to be passed, often painful, if the can't be passed then some type of surgery is often required. If you have lower back pain, in the kidney area, that's often a sign that you have a kidney stone problem.