My father is 65 years old. He has undergone 21 mm kidney stone removal operation via laser and also got urinary stent removed after five weeks after operation. Urinary stent was removed two weeks back and it was there for five weeks. Then urinary tract tract infection was detected after stent removal and for two weeks he is on medication for urinary tract infection and it is healing. He has got ultrasound and urine test done after stent removal and it was found that he had no stone but infection was detected. The main problem is frequent urination even two weeks after stent removal. I am very much worried. Is it a cause of concern?