https://wiki.sarg.dev/index.php?action=history&feed=atom&title=PhotodermatitisPhotodermatitis - Revision history2026-04-23T09:08:13ZRevision history for this page on the wikiMediaWiki 1.44.2https://wiki.sarg.dev/index.php?title=Photodermatitis&diff=462756&oldid=prev203.211.75.248: /* Causes */Typo2025-10-06T01:41:12Z<p><span class="autocomment">Causes: </span>Typo</p>
<p><b>New page</b></p><div>{{Short description|Skin condition}}<br />
{{More citations needed|date=July 2022}}<br />
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'''Photodermatitis''', sometimes referred to as '''sun poisoning''' or '''photoallergy''', is a form of allergic dermatitis in which the [[allergen]] must be activated by light to sensitize the allergic response, and to cause a [[rash]] or other systemic effects on subsequent exposure. The second and subsequent exposures produce photoallergic skin conditions which are often [[eczema]]tous. It is distinct from [[sunburn]].<br />
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Some variants are caused by topical exposure, while others are caused by medications, and still others are caused by medical conditions which generate the allergen precursors in the body.<br />
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==Signs and symptoms==<br />
Photodermatitis may result in swelling, difficulty breathing, a burning sensation, a red itchy [[rash]] sometimes resembling small [[blisters]], and peeling of the skin. [[Nausea]] may also occur. There may also be blotches where the itching may persist for long periods of time. In these areas an unsightly orange to brown tint may form, usually near or on the face.<br />
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==Causes==<br />
Many medications and conditions can cause sun sensitivity, including:<br />
* [[Sulfonamide (medicine)|Sulfa]] used in some drugs, among them some antibiotics, diuretics, COX-2 inhibitors, and diabetes drugs.<ref>[http://allergies.about.com/od/medicationallergies/a/sulfa.htm Sulfa Allergy Symptoms and Risks]</ref><br />
* [[Psoralen]]s, [[coal tar]]s, photo-active dyes ([[eosin]], [[acridine orange]]).<br />
* [[Musk ambrette]], [[methylcoumarin]], [[lemon oil]] (may be present in fragrances).<br />
* [[4-Aminobenzoic acid|PABA]] (found in sunscreens).<br />
* [[Oxybenzone]] (UVA and UVB chemical blocker also in sunscreens).<ref>Rodriguez E, Valbuena MC, Rey M, Porras de Quintana L. 2006. Causal agents of photoallergic contact dermatitis diagnosed in the national institute of dermatology of Colombia. Photodermatol Photoimmunol Photomed 22(4): 189-192.</ref><br />
* [[Salicylanilide]] (found in industrial cleaners).<br />
* [[St John's wort]].<br />
* [[Hexachlorophene]] (found in some prescription antibacterial soaps).<br />
* [[Tetracycline antibiotics]] (e.g., [[tetracycline]], [[doxycycline]], [[minocycline]]).<br />
* [[Benzoyl peroxide]].<br />
* [[Retinoid]]s (e.g., [[isotretinoin]]).<br />
* Some [[NSAID]]s (e.g., [[ibuprofen]], [[naproxen sodium]]).<br />
* [[Quinolone antibiotic|Fluoroquinolone antibiotic]]: [[Sparfloxacin]] in 2% of cases.<br />
* [[Amiodarone]], used to treat [[atrial fibrillation]].<br />
Non-medication conditions that can cause it include:<br />
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* [[Porphyria]]<br />
* [[Lupus]] <br />
* [[Pellagra]] ([[Vitamin B3]] deficiency)<ref>{{Cite web |date=2021-08-19 |title=Photosensitive dermatitis: Causes, symptoms, and treatments |url=https://www.medicalnewstoday.com/articles/photosensitive-dermatitis |access-date=2025-07-26 |website=www.medicalnewstoday.com |language=en}}</ref><br />
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Photodermatitis can also be caused by plants such as ''[[Ammi majus]]'', [[parsnip]], giant hogweed (''[[Heracleum mantegazzianum]]''), common rue (''[[Ruta graveolens]]''), and ''[[Dictamnus]]'', a [[genus]] of [[angiosperms|flowering plants]] in the family [[Rutaceae]] with a single species ''Dictamnus albus'', commonly called the burning bush. Photodermatitis caused by plants is called [[phytophotodermatitis]].<br />
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==Prevention==<br />
Prevention includes avoiding exposure to chemicals that can trigger the reaction, such as by wearing gloves, or avoiding sunlight or wearing [[sunscreen]]<ref>[https://web.archive.org/web/20070927033635/http://www.aad.org/public/Publications/pamphlets/SunandSkin.htm Archived AAD - The Sun and Your Skin], "Allergic Reactions" section</ref><ref>{{Cite web |url=http://www.aad.org/media-resources/stats-and-facts/prevention-and-care/sunscreens |title=AAD - Sunscreens |access-date=2011-04-26 |archive-url=https://web.archive.org/web/20140721190111/http://www.aad.org/media-resources/stats-and-facts/prevention-and-care/sunscreens |archive-date=2014-07-21 |url-status=dead }}</ref> preferably with at least factor 30 and with a high UVA protection level on the affected area. And by addressing any risk factors, such as those listed above. <br />
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==See also==<br />
* [[Phytophotodermatitis]]<br />
* [[Photosensitivity]]<br />
* [[Solar urticaria]]<br />
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==References==<br />
{{Reflist}}<br />
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== External links ==<br />
{{Medical resources<br />
| DiseasesDB = 24609<br />
| ICD10 = {{ICD10|L|57|8|l|55}}<br />
| ICD9 = {{ICD9|692.79}}<br />
| ICDO =<br />
| OMIM =<br />
| MedlinePlus =<br />
| eMedicineSubj =<br />
| eMedicineTopic =<br />
| MeshID = D010787<br />
}}<br />
{{Diseases of the skin and subcutaneous tissue}}<br />
{{Authority control}}<br />
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[[Category:Skin conditions resulting from physical factors]]</div>203.211.75.248