Air-borne contact dermatitis can be diagnosed by-
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.
Skin biopsy
Patch test
Prick test
Estimation of serum IgE levels
Dermatitis