My father, age 79, underwent TURP last year on May 30/ 5 days ago he complained of constipation and the day after he started going to the toilet after every 5 minutes. Quantity of urine passed was less. Got ultrasound done. My father passed just 200 ml and 800 ml was still left in the bladder. Finally, a catheter was put. Laevoflox 750, silodal 8 was started. Urine culture is normal. What should we do? Will he need surgery again? What could be the possible reason for the problem? Please help.