Scar tissue could easily be from Crohn's. The inflamed areas often form scar tissue and that can narrow the colon, making it hard to get the C-scope past that spot. The danger from scar tissue is the possibility of blockage which will result in nausea, vomiting and possibly pain at the blocked area (it is a dangerous complication). My vague recollection of endometriosis is that it is connected to the uterus (or near there). How did that show up as scarring on a C-scope? I don't quite see how the scope could show scarring and still look "fine". It is also a bit rare for a c-scope to be done with you not properly sedated. I have not been awake for my c-scopes, so maybe you should ask about being knocked out for the procedure. It may be that the scar tissue was stretched by the scope and that caused pain - talk to your doctor about that and see if they can give you proper pain prep for the next time. You will need a scope and biopsy to get a proper diagnosis for Crohn's, so don't just try to forget about this. A barium enema would just show narrowing and pouching of the colon and is not a definitive diagnosis for Crohn's.