There are several dermatoses that occur during pregnancy or immediately postpartum, in particular polymorphic eruption of pregnancy, pemphigoid gestationis, and atopic eruption of pregnancy. Pruritus due to intrahepatic cholestasis of pregnancy leads to nonspecific skin lesions, including excoriations due to scratching. Impetigo herpetiformis simply represents pustular psoriasis occurring during pregnancy, and this may be related to the relative hypocalcemia of pregnancy. Lastly, there are physiologic changes that occur during pregnancy.