Perfume intolerance is a condition wherein people exhibit sensitivity or allergic reactions to ingredients in perfume, such as Balsam of Peru.
The most common allergic reactions to perfume or fragrances added to products is contact dermatitis, though other symptoms may occur, including allergic conjunctivitis.
Balsam of Peru was the main recommended marker for perfume allergy before 1977, which is still advised. The presence of Balsam of Peru in a cosmetic will be denoted by the INCI term Myroxylonpereirae. In some instances, Balsam of Peru is listed on the ingredient label of a product by one of its various names, but it may not be required to be listed by its name by mandatory labeling conventions (in fragrances, for example, it may simply be covered by an ingredient listing of “fragrance”).