Got it once last time..Saw an obgyn who gave me antifungal med.
sorry i forgot the name.. but the med is quite expensive and i only took it twice for a day then it's gone already

In the meantime, you can practice really good hygiene such as washing up everytime after you go toilet..then make sure u dry yourself well.

Don't stay too long in a hot / stuffy area because humidity makes it worst.
That's how i got mine last time