photoallergic

Sun-induced skin reaction

Photoallergic describes a reaction in which skin becomes sensitized to a substance only when exposed to light, typically ultraviolet rays.

Unlike a simple sunburn, a photoallergic response requires both a triggering agent—often a medication, fragrance, or sunscreen ingredient—and sun exposure to produce the allergic reaction.

The rash appeared only on sun-exposed areas where she'd applied the lotion, suggesting a photoallergic response.

The related noun is photoallergy.

reaction

dermatitis

Inflammation of the skin

  • rashHeedless or skin irritation
  • eczemaInflammatory skin disorder
  • hivesRaised itchy skin reaction

urticaria · blistering · redness · swelling · itching · pruritus · inflammation · papules · vesicles · edema

trigger

ultraviolet

Wavelengths shorter than violet

  • UVALong-wave ultraviolet
  • UVBMedium-wave ultraviolet light
  • sunlightRadiance from our star

exposure · sunscreen · medication · NSAID · oxybenzone · fragrances · topical · chemical · cosmetics · antibiotics

protection

sunscreen

UV-blocking skin cream

  • SPFUltraviolet defense measure
  • UPFFabric UV rating
  • sunglassesTinted eye protection

wide-brimmed · protective clothing · shade · avoidance · zinc oxide · titanium dioxide · reapplication · indoor

treatment

antihistamine

Drug blocking allergic response

cooling · discontinuation · dermatologist · avoidance · calamine · aloe vera · immunosuppressants

Opposites
light-triggered reaction type

photoallergicsunburn

UV-induced skin inflammation

thermal burn · photodamage

Family

photoallergy

Familiarity
Top 1,000,000
Profile
Used worldwide · Timeless · Negative · Rated G