Allergic contact dermatitis: Testing revealed that this woman is allergic to an ingredient in her shampoo. Rinsing off the shampoo caused this rash.
Irritant contact dermatitis: Handling fish irritated this patient’s skin, causing a painful rash.
Allergic contact dermatitis: Some people have an allergic reaction only when they sweat or UV light hits their skin. Sunlight triggered this bartender’s severe reaction to lime juice.
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