Yeah the bottle can contribute to it. Just take her to the doctors and get that fixed.

Thrush is yeast and yeast feeds off of sugar, which is in formula... Maybe see if there is another formula with less sugar? I'm not familiar with the different brands, but have heard some contain more than others.

I'm a FTM and she didn't really get it until I started suplimenting with formula to get her weight up

@junesmommy15, thank you. !

this^ and make sure you put some on your nipples too. My 2 yr old has it right now.

The doctor prescribes nystatin.