Urinary tract stones begin to form in a kidney and may enlarge in a ureter or the bladder.The pain may radiate down the abdomen toward the groin or testis or vulva. Other symptoms include nausea and vomiting, restlessness, sweating, and blood or a stone or a piece of a stone in the urine. A person may have an urge to urinate frequently, particularly as a stone passes down the ureter.