My dad had a surgery for BPH 1.5 months back. The problems that he had before surgery, seemed to have reduced a lot. But for last 10 days, he started problems in passing urine. Today he was not able to pass urine for 5-6 hrs and had to be rushed to hospital.

Please let me know if all this is normal. Do people have these complications after Surgery. And if yes, for how long?