Why does athletes foot flare up so fast?

I was fine this morning, then like 3 o'clock I'm hobbling around out if no where

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I ran out of clean socks the last couple days, so I guess that's why. This is what happens work outside and are on your feet all day. It definitely comes back easier once it's happened before though. Went ahead and sprayed them down with athletes foot spray like before just before bed and have clean socks on now. I can walk better now at least. It's always something
Why does athletes foot flare up so fast?
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