photoallergy
Sun-induced skin reaction
Photoallergy is an allergic skin reaction triggered by exposure to light, typically sunlight, in combination with a sensitizing substance.
The substance—often a medication, sunscreen ingredient, or fragrance—becomes allergenic only when activated by ultraviolet light: She developed a photoallergy to her new antibiotic after spending time outdoors.
Distinguished from phototoxicity, which doesn't involve the immune system.
Inflammation of the skin
- eczemaInflammatory skin disorder
- urticariaRaised itchy skin welts
- hivesRaised itchy skin reaction
- rashHeedless or skin irritation
pruritus · itching · redness · inflammation · blistering · edema · papules · vesicles
Wavelengths shorter than violet
- UV-ANear-visible solar radiation
- UV-BMedium ultraviolet wavelength
- sunlightRadiance from our star
- sunscreenUV-blocking skin cream
NSAIDS · sulfonamides · tetracyclines · fragrances · topical · oxybenzone · cosmetics · medications
Exaggerated response to stimuli
- antibodyProtein targeting foreign substances
- histamineAllergy-response compound
- immunoglobulinDefensive blood protein
- sensitizationIncreased responsiveness to stimuli
T-cells · immune response · antigen · cytokines · lymphocytes · immunologic · cross-reactivity · activation
Drugs blocking allergic responses
- corticosteroidsInflammation-suppressing steroid medications
- avoidanceDeliberate keeping away
- patch testingDiagnostic skin allergy method
- dermatologistDoctor treating skin disorders
SPF · sun protection · clothing · shade · sunglasses · emollients · topical steroids · immunotherapy
dermatitis
Inflammation of the skin
rash · pruritus · itching · redness · inflammation · blistering · edema · papules · vesicles · swelling
ultraviolet
Wavelengths shorter than violet
sunscreen · NSAIDS · sulfonamides · tetracyclines · fragrances · topical · oxybenzone · cosmetics · medications · chemicals
hypersensitivity
Exaggerated response to stimuli
- antibodyProtein targeting foreign substances
- histamineAllergy-response compound
- immunoglobulinDefensive blood protein
sensitization · T-cells · immune response · antigen · cytokines · lymphocytes · immunologic · cross-reactivity · activation
antihistamines
Drugs blocking allergic responses
- corticosteroidsInflammation-suppressing steroid medications
- avoidanceDeliberate keeping away
- patch testingDiagnostic skin allergy method
dermatologist · SPF · sun protection · clothing · shade · sunglasses · emollients · topical steroids · immunotherapy · desensitization
photoallergycontact dermatitis
Skin reaction from irritant exposure
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