Polymorphic eruption of pregnancy is an itchy, bumpy rash that starts in the stretch marks of the abdomen in the last 3 months of pregnancy then clears with delivery.
It is also called PUPPP or Pruritic Urticarial Papules and Plaques of Pregnancy.
Polymorphic eruption of pregnancy occurs in about 1 in 160 pregnancies.
It is more common in a first pregnancy than subsequent pregnancies.
It is more commonly reported in women with white skin than in women with black skin.
The risk is greater with excessive weight gain, including multiple births (eg twins or triplets).
A male fetus is a greater risk than a female fetus.