Melasma or " mask of pregnancy ". The skin on the upper cheeks and, often, on the forehead and upper lip, experience a localised tan to light brown colour change. In melasma, colour pigment is deposited in excess in the skin's upper layer. Female hormones are believed to be largely responsible for this condition. In fact, the hormonal changes that occur when taking oral contraceptives (birth control pills) or oestrogen replacement therapy (ERT) may produce these skin changes. The return of normal colouring can be a painfully slow process. In fact, melasma can persist for many months after the baby is born or after a woman stops taking oral contraceptives or oestrogen supplements. [ 1 ]

Spider angiomas .

Herpes gestationis Intensely itchy, autoimmune disease characterised by bulbous lesions and associated with pregnancy which tends to recur in successive pregnancies. It may begin at any time between 9 weeks’ gestation and 1 week postpartum, with the average onset being 21 weeks’ gestation. Usually, it lasts several weeks, but it may persist for many months after delivery. In a high proportion of patients the eruption begins around the umbilicus and then spreads over the abdomen to the thighs. The extremities, palms and soles can be markedly affected. The disorder may be associated with other autoimmune diseases such as Graves’ disease and vitiligo. [ 2 ]

Urticaria of Pregnancy . Technically termed Pruritic urticarial papules and plaques of pregnancy (PUPPP). A benign dermatosis that usually arises late in the third trimester of a first pregnancy. PUPPP is the most common of the pregnancy-related dermatoses and typically resolves spontaneously within 1 week of delivery. [ 3 ]