I am 67 year old man in excellent health 5'11 inches 170 lbs who had first kidney stone 2 years ago which following a pain attack passed in about 20 days. Now I had ultrasound for the only reason to see is I have another one. No pain yet. 6mm stone in mid pole kidney calyx. Since the first stone passed, does that mean, this one may pass and then cause pain when it travels through ureter which could be tomorrow or months or years from now. I also travel internationally.