Hi,
It is possible that the infection has not been eradicated completely.
Ciprofloxacin 500mg is prescribed twice daily for at least 5 days for
treatment of UTIs. So please recheck with your doctor if you need to continue the course of antibiotics.
Some measures you can undertake to eradicated the infection include:
Drinking over 2000cc (8 glasses) of fluids per day, preferrably mor.
take tylenol for the pain, every 6-8 hours, but do not continue the tylenol for more than 3 days.