What problem might be indicated by a bulge in the anus that inhibits natural closure? This is something that occurs only sometimes, usually after an extremely forceful bowel movement or when I have been standing for a long period of time at my job. There isn t any pain or itching, and very little blood. I have found that vigorously contracting my abdominal and anal muscles will usually help to close the anus, but lately that seems not to work as well as before.