Melasma

This brown, tan or blue-gray discoloration is most commonly seen in women and is often present on the upper lip, forehead, and cheeks.  It is thought that hormones and sun exposure both play a significant role in its development.  Due to its hormonal link, melasma is most commonly seen in women who are taking oral contraceptive pills or women who are pregnant (known as the mask of pregnancy). It is typically a stubborn, chronic skin condition that can be difficult to treat.