Proctitis

It may be a side effect of medical treatments like radiation therapy or antibiotics.

Proctitis caused by sexually transmitted diseases (STDs) is transmitted through receptive anal intercourse and is most commonly due to gonorrheaand chlamydia, or less commonly lymphogranuloma venereum or herpes virus.

Nonsexually transmitted causes include autoimmune disease of the colon, such as Crohn disease and ulcerative colitis, celiac disease, chemicals, rectal instrumentation, and trauma to the anorectal area.

It may also occur as idiopathic proctitis.