<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have a hard lump at the back of my anus that hurts extremely. If I have to urinate, pass gas, or have bowel movement the pain increases. I feel like I have to have bowel movement all the time from the pressure there. There is nothing visible on the skin, but the lumb is hard and about the size of a large grape. The pain has been there now going on three weeks. Help!  <response>: Hi, Dear,Welcome to Chat Doctor. Based on the facts of your query, You seem to suffer from-could be from ? Proctitis with Infected piles or due to -Fissure in ANO with Infected Sentinel piles or could be due to the Anal abscess with fissure in ANO with infected Sentinel Piles. or could be due to the Perianal Pre-fistular Abscess, which could all cause all these complaints at back of anus. Hope this reply would help you to plan further treatment with your doctors. Contact with a Followup Premium question to ME. Will appreciate your Hitting thanks and writing excellent review comments to help needy patients like you. Good Day!! Chat Doctor. S. Genl-CVTS 