So, a few days ago I noticed a small bump, about the size of a mosquito bite. It itched a little but I forgot about it. Today, I noticed a larger oval shaped shiny patch of skin at the bottom of my buttocks nearing my vagina. It looks like a ringworm to me, but not the jock itch stuff I've read about, just one little ringworm. But everything I've read sad that a ringworm wouldn't appear there, just jock itch.