On the left side of the inside of my buttock crack, i developed what i thought was a spot. It was red and raised with a white head. Not very painful though. After a few days this went away, leaving a lesion that is almost perfectly round, that looks brown in colour. I can see it easily as the skin colour is different.
Every now and again the same lesion goes red and swells up for a few days, then goes down to the brown lesion again. Any idea what this could be? Its not massively painful, just annoying, as it keeps recurring. Almost like a recurring whitehead (spot)