Ay, mama, I understand your worry! White patches na tumatagal and kumakadami like that (especially sa face and back) is something you really should check with your pedia about, kasi maraming possibilities, could be pityriasis alba, fungal, or other skin conditions, and mas better na malaman exactly what it is para sa proper treatment. A few of us mums had similar concerns at ang doctor lang talaga ang nakakapag-diagnose ng tama, so don't second-guess yourself, go for that checkup lang!