>>1489648I had something (not so) similar near my elbow, it turned out to be ringworm I contracted from my dog, after the fucker ran away to mingle with some infected wildlife in the woods. Had the shit for a month, until I used antifungal creme and it went away after another month. Listen OP, you gotta visit a doctor or at the very least buy some antifungal creme and see if it helps after a week or two or not.
My money is on the fungus/ringworm infection