Can endometioses cause severe rectal pain?

Yes. Mostly pelvic pain but it could be called referred pain.

Related Questions

Is it possible for endometiosis to cause severe rectal pain?

Possible but unlikel. Endometriosis can implant on the outside of the rectal wall but very unlikely that it would lead to severe rectal pain, more likely causes would be things such as an anal fissure...See a colon and rectal surgeon if it persists. Read more...
Not usually. This could be a sign of something more serious and should be worked up by a colon and rectal surgeon or gynecologist. Read more...

Diversion colitis: can it cause severe rectal pain and pain with sitting due to inflammation of area and nerves?

It can. Diversion colitis, or symptoms in the remaining rectal stump, can be variable from none, to severe rectal pain, bleeding, fistula and infection. Diagnosis and treatment will benefit you. Hopefully you will become a candidate to get your bowel reconnected. Be well. Read more...