Two of the most common causes of excessive blotchy facial pigmentation (essentially skin stains) are post inflammatory hyperpigmentation and melasma. Post inflammatory hyperpigmentation, as the name implies, can follow any kind of inflammation of the skin from wounds, surgery, laser treatments, infection, acne and other skin disorders. Melasma, which has a hereditary component, can arise spontaneously or be provoked by the hormones of pregnancy, birth control pills and unprotected sun exposure.
For treating both kinds of hyperpigmentation, particularly melasma, I prefer the combined use of preparations containing both hydroquinone and kojic acid. Other depigmenting agents that may prove useful include licorice extracts, arbutin, tretinoin, alpha and beta hydroxy acids. In my experience, more stubborn cases respond best to a combination of home use products containing the ingredients mentioned combined with a series of between four to six in-office, superficial alpha- or beta-hydroxy acid peels spaced at two to four week intervals. For daily sun protection I recommend Cosmedispa's Ultrablock 30 a uniquely formulated sunscreen that contains UV absorbing melanin in addition to conventional sunscreen agents.
Excessive facial hair, which is common on the upper lip mustache area, as well as on the chin and sideburns is more commonly seen in certain groups, such as in those of Mediterranean descent, and in the perimenopausal years when estrogen levels begin to fall. For permanent hair removal, especially when confined to a small area such as the upper lip I recommend the Depilar System, which consists of a series of quick in-office treatments in which, following waxing, threading or electrolysis, protein-dissolving enzymes, such as trypsin and chymotrypsin are appied to the treatment sites penetrate to the base of the hair shafts and permanently destroy the roots.
When both hyperpigmentation and excessive hair affect the same location, as in this case, I would suggest addressing the irregular pigmentation condition first and then dealing with the hair problem.