Below is an instruction from Human. Write a response.
    ### Instruction:
    What causes Hematuria (Blood in the Urine) ?
    ### Response:
    Hematuria can be caused by menstruation, vigorous exercise, sexual activity, viral illness, trauma, or infection, such as a urinary tract infection (UTI). More serious causes of hematuria include
                
- cancer of the kidney or bladder  - inflamm
    