Hi thanks for your question.
Itching in pregnancy
and especially in the latter months is due absorption of bile salts. Increased amount of bile salts are absorbed from the gut due to influence of a hormone called as progesterone
which is responsible for carrying of pregnancy .its concentration increases during pregnancy .Increased concentrations causes stasis of gut, by which more bile salts are absorbed. These bile salts are responsible for itching. However this itching disappears after delivery. Consult a dermatologist
who may examine you to discover any other cause of itching like allergic reaction
Hope this answers your question