If it is not thrush then could it be she just gets too cold. My son is 15 and still to this day his lips turn a freakish blue or purple when he is too cold. When he was younger it used to scare people.

But turning white sounds more like a mouth infection like thrush or a yeast infection. It is very easy to cure. Just make sure from now on whatever she puts in her mouth is clean. By the way, thrush is contagiuos but only if a child sticks something in their mouth from your child's mouth. Good luck and try not to worry till you talk with nurse or Dr.

Its possible this could be thrush, id take her to docs though get it checked out

Im not sure but maybe go to the hospital as it could be something wrong. If it was me i would be seeking medical advice that doesnt seem normal.

love Kell