I.m Using My Son's Email Address. It Started With Itching

I.m using my son's email address. It started with itching between my little toe with a crack in the skin that itched like nothing before. Now there are fluid filled blisters that weep and after opening leave a deep holes . Its spreading to all my other toes. Ive been putting antifungal powder on them but still itch terrible just by applying the powder between them. Never had anything like this before. When the itching first started there were no bumps visible. Will the powder eventually clear this up or should I do something different? my other concern is I go barefoot a lot outside, could I have some kind of parasite?