herpes gestationis

a rare, self-limited blistering skin disorder seen in pregnant women during the second and third trimesters, resembling cutaneous herpes but not due to a herpesvirus; it may be an autoimmune disease. It usually begins on the abdomen and spreads to other sites and is an intensely pruritic polymorphous eruption that may recur with subsequent pregnancies. Called also gestational pemphigoid and pemphigoid gestationis.