When I was diagnosed with a skin fungus thing a year ago I was advised by the doctor to use selsun blue shampoo. I believe it would have worked, but when i opened the bottle it smelled so chemical that i couldn't bring myself to use it. I used the afore-mentioned tea tree oil and it worked fine, although it took a bit longer than the shampoo might have. I have sensitive skin, and sometimes it felt like the oil 'burned' me. Straight garlic feels like this too.
Anyway, here was the solution for me: i mixed the tea tree oil with a little olive oil and it worked fine!
Hope this helps in some way! Bleesings and good luck