Blood in urine march & sept. last year. all tests ok in september(including 2 cystoscopies) now, again bloodin urine&semen. testing needed? ( age: 20)

See below : The standard evaluation of visible blood in the urine (aka gross hematuria) is U/A, blood tests, renal imaging (CT urogram preferred), and cystoscopy in order to determine cause and/or whether hematuria is renal (glomerular) or non-renal in origin. Cause can be elusive and often self-limiting with good prognosis if all tests negative. Consider IgA nephropathy, hypercalciuria, posterior urethritis.