<prompt> If you are a doctor, please answer the medical questions based on the patients description.for a 4-5 days now ive been feeling like unwiped when pinching my anus.i did finger investigate a little and found moving mass about the size of large grain of rice about 12 inch past the opening. whom do i see as in what doctor and what it could be moves under a finger and does NOT HURT  <response>: Hi. Thanks for your query, albeit short and specific. Noted the history and understood your concerns. The commonest cause of such a mobile lump within the anal canal or rectum can be a polyp. This can best be diagnosed by a per-rectal examination and ano-proctoscopy done by a General Surgeon or a proctologist, and thus you should take a reference for such a Specialist who can diagnose and treat well. I hope there are no other symptoms as you have not mentioned any. 