I have a lump inside my butt cheek for several weeks, and it won?t go away. I was applying some medical creams, but they didn?t work. The lump is hard, painful and red. First I thought it was just a big pimple, but a pimple would disappear long time ago. My hygiene habits are excellent, so comments on this subject would be unnecessary. It crossed my mind that many hours of sitting in. Maybe the sitting has worsened my circulation and caused a lump.