Once in a while i'll get an excruciating pain in the rectum & it'll hurt to bend over. it kind of feels like trapped gas that won't release. help?

Not enough detail: Could be sphincter spasm, nerve irritation, gas, etc.Questions to think about-Does it happen after certain foods?Certain times of day?Month?After specific activities?Is there sig. anxiety(can spasm sphincter)?Is there sacral/pelvic musculoskeletal dysf.?A good history & physical, incl. Osteopathic hands-on exam may help find cause.Tests may be needed.Manipulation,meds, food avoidance may be needed