Air-borne contact dermatitis can be diagnosed by-
Skin biopsy
Patch test
Prick test
Estimation of serum IgE levels
air borne contact dermatitis is diagnosed by patch testing with the specific allergen. eg: pahenium is the common allergen tested using patch test. IADVL TEXTBOOK OF DERMATOLOGY, INDIAN PATCH TEST SERIES PAGE 581.
Dermatitis