Your symptoms are suggestive of pruritic urticarial papules and
plaques of pregnancy
(PUPPP). It is characterized by small red bumps and
when severe, the bumps form large patches. This rash usually develops on the abdomen, and spreads to the thighs, buttocks, breasts and arms.
Anti-itching topical medications, antihistamines and topical corticosteroids can be used to control the itching.