Parthenium dermatitis is a distressing dermatitis caused by the air borne allergen of the Compositae weed Parthenium hysterophorus. Uncommon presentations, newer insights in pathogenesis and management of this "scourge" are discussed in this article.
Keywords: Atopic dermatitis; parthenium dermatitis; patch and prick test; type I hypersensitivity; type IV hypersensitivity.