Hi! 7years back I had done haitus harnia operation,after operation I find out like pressure while I pee is low even I can't get erection take long time and that also not hard erection, I just wanted to do mri to check nerve's, please advice

Seek medical attention from a urologist.

Most certainly if urine flow has been bad for 7 years, you needed to see a urologist a long time ago. If just recent, you still need to go. There are many reasons for this. I have a few that I am thinking of, but all need an medical exam.

The internet cannot help you solve your problem, but it can help you find a doctor to help you treat your problems.