3 days ago I had what I thought was a painful pimple on the lower left butt cheek. (in the area under the elastic leg opening of my underwear) It hurt to touch. My boyfriend looked at it and saw a dark spot in the middle of the "head" and thought it could possibly be a wood splinter or sticker. I had been wearing shorts when we worked on sprinklers and landscape which included dry bark and several plant varieties that were stickers. When he popped it, a piece of something dark and hard came out along with a bunch of puss and blood. It was extremely painful, like a hot fire place poker was stuck in me. We applied peroxide and antibiotic creme and went to sleep. The next day another piece of "splinter" more puss. Cleaned it again. The flesh around the pimple was hard to the touch, quarter size, hot to the touch and my left butt muscle hurts even to sit down. The next day there is no sign of a whole or exit of a pimple or anything else, but the flesh is rock hard the size of a baseball red hot and so painful, I can't sleep on my side and sit to my right. It's been four days, still swollen, hot and painful. I do not have insurance, and really can not afford a hospital visit.( I have been nauseated and feeling pain in my joints) but I put it down to the weird positions i have to sit and sleep in and concern over what it is I have been bitten? stung? splinter? any ideas?