To treat fungal infections, you can use a dandruf shampoo like a body wash. A good shampoo can be Head and Shoulders which has as an active ingredient Pyrithione zine 1pct. Another thing you can do is by Lotrimin which cures athletes foot and jock itch. This contains miconazole nitrate 2pct.
All the over the counter shampoos and athlete foot/jock itch all do the same thing and kill fungus.