Sometimes bladder stones — even large ones — cause no problems. But if a stone irritates the bladder wall or blocks the flow of urine, signs and symptoms may include:  Lower abdominal pain Pain during urination Frequent urination Difficulty urinating or interrupted urine flow Blood in the urine Cloudy or unusually dark-colored urine 
bladder stones — large ones — cause problems  stone irritates bladder wall blocks flow urine  signs symptoms may include:  lower abdominal pain pain urination frequent urination difficulty urinating interrupted urine flow blood urine cloudy unusually dark-colored urine 
bladder stones