It looked like ringworm from the first pictures and now it's ringworm from the second pictures.
I got one right below my knee and it itched like mad.
Since i work in a micro lab, I scrubbed it with the uber antimicrobal(it has a anti fungal properties in it) hand soap twice a day and put antifungal cream on it. I also put a band aid over it during the first two weeks so I wouldn't contaminate my clothes and my apartment.
Twice a day clean it with a antimicrobal soap (The antibacterial is good to prevent staph infection). Then put the cream on it along with a bandaid on it.
Do this for two weeks and after you can ditch the band aid.
A mushroom walked into a bar the the bartender said "HEY! We don't serve your type here!" and the mushroom replied, "Aw man, but I'm a fungi....."
I know, 2/3 of a pun.