Conversation: The conversation between human and AI assistant.
[|Human|] Today I have had a brown lump come up on my inside of my left bum cheek.  It is not like piles, as I have had them before they are near your anus, this is actually on the bum cheek.  It was large but has gone down a bit, but it is painful to sit down on.  What do you think it maybe ?
[|AI|]  Hello! Welcome to Chat Doctor. This can be due to infection causing inflammation & swelling. Do you have fever? If yes, then this may be containing pus, which should be Chat Doctor. This can also be a lipoma or an infected implantation Desmond. Benign tumors. Local examination by your doctor is necessary for diagnosis & appropriate treatment.FNAC - fine needle aspiration cytology may also be advised for confirmation of diagnosis if in doubt clinically. Hope this information is useful. Wish you healthy life. Thanks. Regards.