My daughter is nine and has just gotten vitilligo on her face. The dermatologist has given creams. Her blood work was normal. What else could be cause?

Genetics & immune. The patchy nature and distribution in vitiligo are rather distinctive.A few other skin conditions can temporarily mimic the process. About 30% of cases have a family history & peak incidence appears to be 10-30y. The present view of origin is immune destruction of pigment cells is those with genetic susceptibility.Patches appear & remain for life, ~1/3 show some limited repigmentation.