How To Get Rid Of White Patches On Skin?

my daughter she is 2 months 20 days old, at birth for first 3 days her skin was excellent but on 4th day there is a big white patch on left leg, but i get to see that her skin color is repigmenting like initially small dots and then spreading the skin color, does that mean i can stop worrying and that she is not viitiligo patient