Linked from
The 19 pages that link to Allergic contact dermatitis, each with the reason it gives.
Contact dermatitisBroader topic: This form is driven by a specific immune response to an allergen.
Hair dyeRelated: Some hair-dye ingredients can sensitize skin and provoke this reaction.
UrushiolNarrower topic: Urushiol causes this skin reaction after sensitization.
AnacardiaceaeRelated: Urushiol from several family members is a common cause.