Hello,
Microscopic hematuria can be due to urinary tract (bladder) infection, swelling in the filtering system of the kidneys ,stone
in bladder or
in a kidney, blood disease, like sickle cell anemia, certain medicines and tumors
in the urinary tract.
You may need a series of investigations like urine examination, urine culture, ultrasound or cystoscopy to confirm the diagnosis. Please consult a urologist and get it done.
I hope it helps. Take care and regards.