<s>[INST] i have a lump where i sit.  i have had it for almost a year.  for a while it was just a painful lump and i went to the dr.  he looked at it and prescribed me some antibiotics. it has now been draining for a year.  i need to know how to get rid of it.  it seems to start at my anus but the actual pus and discharge is where my butt cheek meet about 1 inch away. [/INST] Hi,From history it seems that you might be having fistula in ano and now pus discharging sinuses giving this problem.consult surgeon and get examined.If fistula is there, it requires surgery with opening of all sinuses opening into anal canal.Ok and take care. </s>