Is it safe to use cetaphil body wash and lotion on a 6 week old baby face for hives and dryness?

Leave it alone. Baby acne is triggered by babies high level of maternal hormone levels that sustained the pregnancy. Clamping the cord cuts off new hormone input, but leaving the wet spa of pregnancy puts baby in contact with skin irritants & germs.At 6 wks this is peaking & worrisome. Leave it alone.Bathe with normal soaps & let it fade over time.Lotions attract dust & sour leading to more washing & dryer skin.
Yes but.. Hives are unusual in a 6 wk old and are more likely a newborn rash which might not improve with wash, but should go away over time.