Wore Fur Boots In Hot Room For About 2 Months,

Wore fur boots in hot room for about 2 months, have missing skin on top of soles especially right foot 2×3 cm, hurts a bit, pach is red a bit, I just put some Lamisil cream on it and now looks better, was a bit white at first but now has cleared up. What can it be? Thank you very very much.