My husband & I are commerical drivers that drive across country. When we are running behind, he sometimes has to urinate in empty water bottles. This morning he peed in a bottle, but at the end of him emptying his bladder , he pased a large amount of white, thick, chalky substance. What can thrat be? A few day ago, he had pain to the touch on his right lower side, but that only lasted about 1 to 2 days.