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Sunburn is a form of radiation burn that affects living tissue, such as skin, that results from an overexposure to ultraviolet (UV) radiation, usually from the Sun.Common symptoms in humans and other animals include red or reddish skin that is hot to the touch or painful, general fatigue, and mild dizziness.
Dermatosis papulosa nigra (DPN) is a condition of many small, benign skin lesions on the face, a condition generally presenting on dark-skinned individuals. [1]: 638–9 DPN is extremely common, affecting up to 30% of Black people in the US. [2] From a histological perspective, DPN resembles seborrheic keratoses. [3]
The Fitzpatrick scale has been criticized for its Eurocentric bias and insufficient representation of global skin color diversity. [9] The scale originally was developed for classifying "white skin" in response to solar radiation, [2] and initially included only four categories focused on white skin, with "brown" and "black" skin types (V and VI) added as an afterthought.
“By definition, a sunburn is too much skin damage induced by the sun’s ultraviolet rays resulting in redness, peeling, swelling, and even blistering,” says Kenneth Mark, M.D., a cosmetic ...
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When the skin gets inflamed from acne, it triggers the release of more melanin, leading to dark spots. And getting a lot of sun exposure can exacerbate the problem by making those spots even darker.
Skin darkening from UVA exposure does not lead to significantly increased production of melanin or protection against sunburn. [9] In the second process, triggered primarily by UVB, there is an increase in production of melanin (melanogenesis), [ 10 ] which is the body's reaction to direct DNA photodamage (formation of pyrimidine dimers ) from ...
Polymorphous light eruption (PLE) presents with itchy red small bumps on sun-exposed skin, particularly face, neck, forearms and legs. [1] It generally appears 30 minutes to a few hours after sun exposure and may last between one and 14 days. [3]
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