A member asked:

What causes skin on upper lip to darken with exposure to sun?not taking birth control pills or hormones.still have ovaries.38 years old.periods reg.

A doctor has provided 1 answer
Dr. Vicki Levine answered

Specializes in Dermatology

Melasma: No one really seems to know what causes melasma. It seems to be a combination of the sun, hormones and a predisposition. You should see a dermatologist. It can be treated with prescription bleaching creams and certain sunscreens. Treatment takes months and is not always successful.

Answered 8/1/2013

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