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  1. WebJul 5, 2022 · Solar urticaria, also known as sun allergy, is a rare allergy to sunlight that causes hives to form on skin that’s exposed to the

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  2. Sun Allergy: Types, Symptoms, and Prevention
    Sun allergy is not a single condition, but a group of disorders that make your skin react to sunlight with rashes, hives, or blisters.
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  3. WebAug 17, 2017 · Solar urticaria is a rare condition that causes an itchy, red rash when the skin is exposed to sunlight. It is an allergic reaction to the UV light of the sun or artificial light sources. Learn about the causes, …

  4. Sun allergy


    Sunburn is a condition that occurs when the amount of exposure to the sun or another ultraviolet light source exceeds the ability of the body's protective pigment (melanin) to protect the skin.
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    Symptoms vary, depending on the specific type of sun allergy:

    • PMLE - PMLE typically produces an itchy or burning rash within the first two hours after sun exposure. The rash usually appears on sun-exposed portions of the neck, upper chest, arms and lower legs. In addition, there may be one to two hours of chills, headache, nausea and malaise (a general sick feeling).
    • Actinic prurigo (hereditary PMLE) - Symptoms are similar to those of PMLE, but they usually are concentrated...
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    If you have a sun allergy, you’ll experience a rash on sun-exposed skin. This allergy, medically known as polymorphous light eruption, is different from heat rash or sunburn. Researchers aren’t sure the exact causes of sun allergy, or why it can appear suddenly during young adulthood.
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    Dr. Howard E. LeWine

    M.D. Chief Medical Editor, Harvard Health Publishing · 40 years of exp

    To help prevent symptoms of a sun allergy, you must protect your skin from exposure to sunlight. Try the following suggestions: • Before you go outdoors apply a sunscreen that has a sun protection factor (SPF) of at least 30 or above, with a broad spectrum of protection against both ultraviolet A and ultraviolet B rays. • Use a sunblock on your lips. Choose a product that has been formulated especially for the lips, with an SPF of 30 or more. • Limit your time outdoors when the sun is at its peak — in most parts of the continental United States, from about 10 a. m. to 3 p. m. • Wear sunglasses with ultraviolet light protection. • Wear long pants, a shirt with long sleeves and a hat with a wide brim. • Be aware of skin care products and medicines, especially certain antibiotics, that may trigger a photoallergic eruption.
    Q&A: Sun Allergy
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    Still, researchers don’t know the exact cause of sun allergies. Hormones, autoimmune function, and exposure to ultraviolet (UV) light all seem to play a role. Sometimes, reactions to the sun result from certain medications or skin care products.
    Swelling. Rarely, sun allergy can cause systemic symptoms, such as: Headache. Light-headedness or fainting. Nausea and vomiting. Wheezing or shortness of breath. Life-threatening anaphylaxis (with solar urticaria).