Kidney stonee pain is caused by all the points on the stone (looks somewhat like a bramble)cutting the ureter as it comes out. There is a Chinese herb formula that can dissolve small stines (especially the sand like kind) but it can also smooth all the points on the larger ones making it smooth like a river rock. This makes it much easier to pass. In addition, I have a FSM protocol that treats the ureter for pain. The herb formula can also be used as a preventative treatment for those with a history of kidney stones.