What Causes Severe Pain During Urination And Intermittent Urination After Perpuce Infection?

MY SON WHO IS 13 YRS. OLD WITH 40 Kgs. BODY WEIGHT, HAD PHIMOSIS WITH BELANOPROSTHESIS. AN EMINENT SURGEON SUGGESTED TO GET CIRCUMCISSION DONE DURING MARCH 14. TEMPORARILY TO REDUCE THE INFECTION IN THE PREPUCE. HE HAS PRESCRIBED ZANOCIN 100MG. WITH A DOSAGE OF 2 TABS. IN THE MORNING AND ONE IN THE NIGHT FOR FIVE DAYS. ALONG WITH ZANOCIN, HE HAS ALSO PRESCRIBED CITRALKA (ALKALINE CITRATE) AND T-BACK OINTMENT FOR TOPICAL APPLICATION. TODAY IT IS THE FIFTH DAY. THOUGH THE PAIN IS REDUCED MODERATELY, STILL THE BOY IS COMPLAINING ABOUT SEVERE PAIN DURING URINATION AND URINATION IS NOT CONTINUOUS. DOES IT TAKE SOME MORE TIME TO GET THE PAIN REDUCED AND RESUME THE NORMAL URINE FLOW. SHOULD WE CONTINUE ZANOCIN 100 MG. FOR MORE DAYS. PLEASE SUGGEST.