Dermatitis - contact
Description
- Inflammatory dermatitis from external exposure - two distinct mechanisms with different management
- Irritant contact dermatitis (ICD, ~80%) - direct chemical/physical damage, dose-dependent, no prior sensitisation needed
- Allergic contact dermatitis (ACD, ~20%) - type IV (delayed) hypersensitivity, requires prior sensitisation, occurs at any exposure dose once sensitised
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