The common causes for painless bleeding in the urine are infections of the
kidney/bladder, disorders of the
kidney/bladder, certain
blood disorders, strenuous exercise
and certain medications. The commonest causes are urinary tract infection or kidney stones. You will need to consult your primary care physician for proper assessment. He may do tests like urine analysis, blood tests, X rays, ultrasonography, CT scan and sometimes cystoscopy to detect the cause for painless hematuria.