another photo montage i posted that may be related - my infection started like your three years ago on legs - Getting yours ID'd asap a good thing.
...seems that getting treatment asap to knock it out (assuming it is a parasite) prevents spreading/entrenching.
User "ICU" has possible related "cures" as does "sharkman" the only person I have found actually cured themself on here...getting a doc to scrap or biopsy your postules AND be open minded about "possibility" this is parasite a huge fortunate occurrence.