Hi,
Their can be many reasons,
Causing blood in urine,it may be
renal stones,
Recurrent UTI,kidney diseases like
nephritic syndrome,proastate infection,tuberculosis
Various diseases can cause,
Cancer presents not merely with blood in urine,but also lump difficulty in micturation,passing stool,
Some investigation needs to be done like,
ultrasound abdomen and pelvis ,
complete blood count,urine routine microscopy and culture,
Your treating doctor will be knowing it,
Hope this information helps.