My 1 month new born has blochy dark red skin when does this go away?

See Your Doctor NOW: Any rash on a newborn must be examined by a physician. While there are benign rashes that do occur, life-threatening infections can present as a rash in newborns. Be aware that rashes require visual inspection to make the diagnosis; also newborns show almost no symptoms if there is an illness. See your doctor IMMEDIATELY for correct diagnosis and treatment to ensure the safety of your newborn.