The only dangerous kidney stones are those that cause obstruction, although you can have pain just because they are moving around. What MDs won't tell you is that you may be able to reduce the size of your stones by taking a supplement called Nigella sativa. Another name is black seed oil, but use the proper plant name of Nigella sativa to get the right thing. Whole Foods carries the oil, and many herbal health stores do. You can order it from Amazon. You need a highly rated brand that is organic, cold pressed, etc. You would take 1 tsp every night in organic orange juice before bed. This will help break up the most common forms of kidney stones. If you tell a doctor he will say it's poppycock, but medical tests have been done and the tests confirm. Research it yourself. The oil is very high in antioxidants and prevents all kinds of infections and cancer cells. I used it all the time. If you use too much you can smell it, which kind of smells like dirty oregano. So use 1 to 1 1/2 tsp, not 2 or 3 tsp every day. The only other thing, again, if i use too much, is I have a little acne from oily skin. That's it.
I also forgot to mention I have had hematuria (blood in my urine) for over three weeks now which I don't understand when the stones are still in my kidneys.