I had a small lump on the bottom of my left buttocks not quite inbetween my cheeks but almost (about the size of the end of an eraser) for about a month and a half. I tried to pop it and a little blood came out. It reduced in size to where I could barely feel it anymore. Then last week it came back in the same spot and feels a little swolen and looks a little red. What do you think? Should I see a GP? It is now starting to hurt a little bit when I walk or sit down. Also rode my bike several times this week so I wonder if that got it to come back because last month I didn t ride my bike at all. Thanks for you help!