ICD-11 definition : A common condition of incompletely understood aetiology characterized by patchy melanin
pigmentation of the malar prominences, forehead and perioral skin. The pigmentation
is exacerbated by sun exposure. Melasma is common in pregnancy and in women taking
oral contraceptive preparations; it may, however, also be seen in men.;
A common condition of incompletely understood aetiology characterized by patchy melanin
pigmentation of the malar prominences, forehead and perioral skin. The pigmentation
is exacerbated by sun exposure. Melasma is common in pregnancy and in women taking
oral contraceptive preparations; it may, however, also be seen in men.