From what I read, since it is a bacterial infection it should be treatable. So don't give up too quickly.
Although, I also read it can be exacerbated by rubbing (which hair may have provided some insulation again). It may be possible to be "nearly sly" with a really close buzz cut as an alternative.
Please keep us posted so we can all learn through your experience.
Personally, I'm betting on a simple treatment to eradicate the infection and you'll be Totally Sly again.