7 days after cystoscope (TURB ?) to remove a bladder tumor I had a UTI (low grade fever, pain and slight ammount of blood in urine) I treated it with tylonol and cranberry juice and got better after three days. However the back pain persists especially at night and is worse in getting up but then goes away when I have coffee and eat. The pain feels like a back strain and is constant but not severe. My question is that is it a kidney or just a back ailment? I should add that I am a male 75 years old.