Thanks for writing to HCM
You didn't mentioned your age.causes varies with age.
Any way,there are various causes of hematuria( blood in urine).Causes may be Renal,ureteric or urinary bladder calculus
,tumours,trauma,urinary tract infection
So,you need proper clinical examination,history and thorough investigations.
of KUB region should be done ,CT Scan can be done if needed.
Further investigations depends upon the findings.