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  2. Sun tanning - Wikipedia

    en.wikipedia.org/wiki/Sun_tanning

    In the United States and Western Europe before the 1920s, tanned skin was associated with the lower classes because they worked outdoors and were exposed to the sunlight. Parasols and long sleeves were typically worn, even at beaches. [34] By the 1920s, however, a cultural transformation took place, and tan skin became the ideal. [34]

  3. Light therapy - Wikipedia

    en.wikipedia.org/wiki/Light_therapy

    Light therapy, also called phototherapy or bright light therapy is the exposure to direct sunlight or artificial light at controlled wavelengths in order to treat a variety of medical disorders, including seasonal affective disorder (SAD), circadian rhythm sleep-wake disorders, cancers, and skin wound infections.

  4. Poikiloderma - Wikipedia

    en.wikipedia.org/wiki/Poikiloderma

    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.

  5. What is red light therapy? - AOL

    www.aol.com/red-light-therapy-163959131.html

    It uses 84 LEDs that can project red light (633 nm), near-infrared (830 nm), or blue light (415 nm) across the entirety of the face. Treatment with the MZ Skin mask has anti-inflammatory effects ...

  6. Polymorphous light eruption - Wikipedia

    en.wikipedia.org/wiki/Polymorphous_light_eruption

    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] The bumps may become small blisters or plaques and may appear bloody, [3] often healing with ...

  7. Light-emitting diode therapy - Wikipedia

    en.wikipedia.org/wiki/Light-emitting_diode_therapy

    Light-emitting diode therapy (LEDT) is a clinical approach that applies different wavelengths of light to cure diseases or conditions with skin-safe lights. Following NASA's innovation in the 1990s with Light Emitting Diodes (LEDs) that emit a specific narrow light spectrum, LED Therapy (LEDT) showed significant potential. [ 1 ]