text: what causes blood in the urine? have gone for a series of tests urine sampling ultrasound both have come back with negative results there is no pain or a burning sensation when passing urine. tests have found no trace of bilhazzer which many doctors thought it could be. have had these symptoms for +- 10 months if you could come up with any possible sollutiuons it would be of great help well, i was actually listening to a talk radio the other day and someone called in and asked almost the same question.  blood in urine, no pain.  basically the doctor told him to go to the doctor and have his kidney's checked.  go to a doctor that does that for a living, not just a family doctor.  he said to go to a specialist who looks at internal organs.  he also asked if the man had ever been hit in the kidneys, like when he was younger and the man said that kidney punches were the thing back then.  maybe an idea to check out the kidneys.  good luck.