of course, we already know that sun damages the skin, flattening the layers of skin and accelerating collagen and elastin breakdown. these biological processes and physical changes beneath the skin allow pigment to move deeper and can decrease the effectiveness of treatments.
melasma also seems to be related to female hormones, and tends to occur most commonly during pregnancy or in women who use oral contraceptives. but there are other important contributing factors, including other hormones (thyroid, adrenal, pituitary, msh), as well as topical cosmetic use, medications that increase sun sensitivity, and heat exposure — all of which affect the production of skin pigment.
what does melasma look like?
melasma is characterized by a brownish patchy pigment which develops symmetrically, but with irregular contours, most often on the forehead, cheekbones, chin and jawline. other areas include the upper lip, neck, chest, arms, shoulders. it doesn’t spread and is not contagious.
how can i tell if i have melasma?
sun damage can cause hyperpigmentation of the skin, but this is different from melasma. sun damage tends to appear in the form of freckles or dark patches, but doesn’t usually have a pattern. it’s important to note that all types of sun-damaged skin age more harshly than other skin by comparison.