a patient has contact dermatitis after application of a Thai herbal balm call green herb herbal balm. She got localised vesicular rash after application of the product. The composition is as follows : Hop Headed Baleria Herb, Esldpagpon Herb, Borneol Camphor, Eucalyptus oil, Peppermint Oil, Cinammon Oil, Cajaput Oil, Clove Oil, Menthol, Methyl Salicylate. I wonder which component cause the allergy.