Doesn't have much relation with your surgery other than UTI. If you were catheterized for urinary problems after surgery, than have increased chance of UTI again. Take plenty of liquid Get it done urine R/M and C/S.

This problem has nothing to do with ur surgery. It can be bcos of less water intake or urinary tract infection. It might or it might not go on its own.

Burning sensation at the end of urination or after urination might suggest urinary tract infection or some vesical calculus irritating the trigone It can also happen because of very concentrated urine Please check if you had this complain before during the summers only If yes then it might just be because of concentrated urine being formed. You can treat this with good fluid intake If not or if the symptoms persists even after doing this then you might need to get checked for uti or vesical calculus. It has no relation with grade 3 hemorrhoids Hope this helps you out