Please don't look at this if you get grossed out

I posted about this early some of you may have saw. But now it has popped.

I need advice because I can't afford to go to the doctors especially if it's something not that serious. But I'm generally concerned about MRSA. I had it when I was young and I heard once it's in your system your more prone to it. Don't even bother to comment if you're just gonna be rude. Just looking for similar experiences thanks.