My son was patch tested last year, the result being he is allergic to colophony (found in adhesives, paper, ink etc etc) and balsam of peru ( found in perfumes, toiletries etc etc).
I now use 'simple' range of bath,shower, hair washing stuff for him. Its really tricky finding things that do not have 'parfum' in the ingredients, but I'm thinking that washing and softening products (persil/fairy) probably contain parfum, anyone know where I can get unperfumed washing powder/liquids??