I had a routine colonoscopy and next morning had lots of pain and was first morning since I was 12 that I didn’t wake up with an erection.. Went to hospital and they said my appendix was infected and about to burst. After closer examination by second doctor, they determined it was just air. He let it slip that they must have used WAY too much air. I have not had an erection since. Doctors refused to admit it was related. Finally found a doctor who did a pelvic MRI and I have a damaged prostate. Have you had an MRI to see if this might be the same case for you? I hear lots of men taking about ED and urinary issues after a routine colonoscopy and it certainly isn’t listed in the complications warnings. It’s made such a horrible impact on my life! I’m only 52 and my wife and I have not been able to have sex for the last two years! It’s emotionally devastating as well when you can’t perform. My wife and a lot of our friends now refuse to have a colonoscopy after seeing just how many people have life altering problems after one. No “routine screening” should cause significant permanent problems in as many people as this does!