Hi. Thanks for your query, albeit short and specific. Noted the history and understood your concerns. Formation of a round shape of the skin at the anus on passing stool and vanishing after completion of the motion indicates this can be one of the following: This can be a small prolapsing pile that comes out on straining during passing stool and vanishes once the pressure is eased out. I would advise you the following in such a situation: Get the per-rectal digital examination and ano-proctoscopy by a General Surgeon to get the exact diagnosis. You may get this operated or banded if this is a prolapsing pile. Polyp can be removed and sent for histopatho examination. Take sitz bath before and after passing motion. Take laxatives and/or stool softeners to have soft stools which do not need straining.