Hi,
Welcome to health care magic,
Frequent urination with blood in urine (hematuria) with lower back pain could occur normally when you took food like beets or blackberry,drugs induced and it subsides automatically after the withdrawal of that.
If it will come continuously then it can be due to
urinary tract infection (acute cystitis), stones (kidney or bladder),acute
urethral injury,kidney cyst or rarely tumor in kidney,ureter,bladder etc.
Do you have any symptoms since this hematuria?
Treatment is mainly depend upon the underlying cause or diagnosis for which you have to undergo routine blood and urine investigations with ultrasound of abdomen or
cystoscopy to rule out bladder stone/tumour/growth.
You must
consult urologist and get it diagnosed first.
Meanwhile continue to take cranberry juice,water and some over the counter pain killer.
Thanks and regards,