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It affects areas exposed to the sun and tends to be intractable. A few minutes of exposure to the sun induces pruritus, erythema, swelling and pain. [4] Longer periods of exposure may induce second degree burns. After repetitive exposure, patients may present with lichenification, hypopigmentation, hyperpigmentation and scarring of the skin. [5 ...
Postinflammatory hypopigmentation is a highly prevalent pigmentary disease. It can happen to any type of skin. Nonetheless, individuals with darker skin seem to have it more frequently and visibly, perhaps due to the color contrast with their natural skin. The incidence of postinflammatory hypopigmentation is the same for both sexes. [2]
Poikiloderma is a skin condition that consists of areas of hypopigmentation, hyperpigmentation, telangiectasias and atrophy. Poikiloderma of Civatte is most frequently seen on the chest or the neck, characterized by red colored pigment on the skin that is commonly associated with sun damage.
This is an accepted version of this page This is the latest accepted revision, reviewed on 2 March 2025. "Skin pigmentation" redirects here. For animal skin pigmentation, see Biological pigment. Extended Coloured family from South Africa showing some spectrum of human skin coloration Human skin color ranges from the darkest brown to the lightest hues. Differences in skin color among ...
Phytophotodermatitis, also known as berloque dermatitis, [1] [2] [3] margarita photodermatitis, [4] [5] lime disease [6] or lime phytodermatitis [6] is a cutaneous phototoxic inflammatory reaction resulting from contact with a light-sensitizing botanical agent (such as lime juice) followed by exposure to ultraviolet A (UV-A) light (from the sun, for instance).
The hypopigmentation is due to both reduced activity of melanocytes with fewer and smaller melanosomes. [5] [6] The cause of pityriasis alba is not known. Dry skin and atopic dermatitis may co-exist. The patches may become more apparent after sun exposure, when the normal surrounding skin is tanned. [1]
industry are of concern as they could be a source of exposure for humans, wildlife, and the environment. An Environmental Health Officer (EHO) at the Food and Drug Administration (FDA) conducted an investigation to find the missing mercury in the chlor-alkali industry [7]. The path of the investigation
Genetics, sun exposure, and some drugs are the three main factors that contribute to skin pigmentation. [4] The most frequent cause of low melanin concentration (hypopigmentation) is prior skin trauma, which includes skin lesions including blisters, burns, infections, exposure to chemicals, and other wounds. The skin will appear paler than the ...