What can i use to treat my two year old's thrush in her mouth & private?

Thrush: Thrush is common in small babies (mother's colonization, yeast infection on breast nipples). Older children may get it if on antibiotics that affects bowel flora and if have weak immune system. Need to talk to the pediatrician who may recommend use of nystatin. Thrush gets better on its own in few weeks but if causing pain in the mouth needs to be treated right away.