Rashes in newborns can be red and flaky, other times just changes in skin color. It is not unusual for newborns to have a rash with small pimples or small white dots. If there is a rash that is increasing in prevalence, possibly with fluid-filled blisters, you should consider contacting healthcare personnel.
About half of all newborns get a red-pink and small-pimpled rash (erythema toxicum neonatorum) which often starts on the face and can appear anywhere, but rarely on the palms of the hands and soles of the feet. It typically comes 1-2 days after birth and lasts a couple of days. This is harmless and does not cause problems for the child. A type of heat rash (miliaria) is seen in 15% of all newborns and occurs most frequently in warm climates. The cause is probably blockage of the sweat glands. Acne in newborns (neonatal acne) can occur on the face and should go away on its own within a couple of months. Other causes can be milia, marbling of the skin and infections. In newborns, you can also find suction blisters.
Usually not necessary, but it must be considered on a case-by-case basis.