I have a follow up appointment coming up after my spell in hospital with kidney stones. Whilst in hospital, they discovered I have quite a few of the little beggars. Does anyone know what usually happens in these cases? Do they advise treatment/surgery to take them out or do they usually advise to leave them alone? As yet, they dont know what type of stones I have, but by far the most common are apparently formed of calcium, which I think can only be removed by invasive means.