I understand how worrying it can be when your sweet baby has a persistent rash, especially when the prescribed hydroxyzine (Atarax) hasn't helped. At 20 days old, skin bumps like red papules and white spots are quite common. They are often harmless conditions like neonatal acne or erythema toxicum, which usually resolve on their own. However, because the rash is generalized and not improving, it is very important to have your pediatrician examine her. They can rule out any infections and recommend the gentlest care, which usually involves just mild soap and water.