I think mine were more outside. I only get them when I eat the wrong things. It probably has not happened for a year or more.
The problem with surgery is that you don't treat the cause so you might get another one later.
I once had a colonoscopy but it was a virtual one like a ct scan.
People do them all the time but I prefer to stay away from it if I can help it. I still think it is invasive.
It is like gallbladder surgery I try to find other solutions.
I tried to find some info for you, but I did not do too well. One person had problems with enzymes, you would not expect that.
Can you stop all your supplements for a while and see if it makes a difference.
If you have Andreas's Amazing liver cleanse on page 33 he writes about varicose veins what basically a hemorrhoid is.