I'd like to add to the last post, in that the fungicidal scrub is much better than the betadine (which can sting). It's called Novalsan and is found right next to betadine on shelves. It leaves an antimicrobial film for a couple days.
If you are going to have any biopsy work done, ask them to do a "Silver Stain" in addition - or instead... since the biopsy can come back Neg. If it's something more like the Florida Leeches. www.fivestarfungusfree.com