Skin problems that occur during pregnancy may last for certain periods after childbirth. [simple_tooltip text=Pruritic urticarial papules and plaques of pregnancy tooltip=A skin condition causing intense itchy, red rashes in the belly area during pregnancy. ] (PUPPP) rashes may occur either in the later stages of pregnancy or shortly after childbirth. It usually affects the breasts, upper thighs, and arms (7).