Mushrooms in my toes

First off, I never get athlete's foot. Maybe once when I was younger before I learned that you have to dry your feet out once in a while. It's a lesson you learn quickly, and being that Utah is a desert, it doesn't happen all the time. However, I have gained a case of it here because A: as you can imagine it's quite humid next to the ocean, and B: it's way too cold to take socks off for even a minute. So, I was hoping it would just go away but it's become irritating and painful enough that I finally had to try to make a move to get it taken care of.
I go to the farmacia and quickly discover that anything even remotely resembling a medicine is behind the counter. This, for some reason, includes chapstick. (That's probably more of a theft deterrant than anything else, but it illustrates my point nicely.) So I ask for 'cream for the toes, for um, pain in the skin'... and the girl looks at me and says "pico?" and I look at her like "what in the world is pico?" and then she tries a new word, "hongos?". I had been wondering if I should throw that word in there since I knew that was the word for mushroom, but I was afraid there was a much more technical term for fungus and I would be laughed at. Hey, sometimes you learn something new the hard way.