Your symptoms are suggestive of pruritic urticarial papules and plaques of pregnancy
(PUPPP). It is characterized by small red bumps
and hives, and when severe, the bumps form large patches. This rash usually develops on the abdomen, and spreads to the thighs, buttocks, breasts and arms. Slight itching from PUPPP may cause mild discomfort. However, PUPPP does disappear after delivery.