No. it does not affect bowels, you can get kidney stones from other things besides dehydration. I had at least 12 stones due to an addiction to antacids which had calcium in them. I ate them everyday, probably a roll or so a day. You can never be sure what pain is from without seeing the stones or being examined by a Dr. I had to have a series of ultrasounds done, even though I passed two stones in a urine cup, one about the size of a pen tip, the other about twice that size.