I cured mine with tea tree oil after getting it from one of my 4 shower-sharing roomies.
Doused the infected area with tea tree oil, between toes really well, and on/under toenails. After obsessive overuse of the tea tree oil I massaged some coconut oil in- and then yes more tea tree oil. Threw some fresh socks on and went to sleep.
36 hours later and totally gone- if there wasn't scars I wouldn't be able to tell where it was!