“…(27) The respiratory symptoms reported by hair stylists in this study are consistent with those reported in other studies of hair stylists. (23,34) Occupational asthma among hair stylists has been associated with persulphate salts used in hair bleaches, henna, and other hair dyes containing paraphenylenediamine. (23,29) In addition to shortness of breath, cough, wheezing, and chest discomfort, other symptoms including irritation of the mucous membranes of the eyes, nose, and throat, headache, nausea, and vomiting following exposure to various aerosols have been recorded.…”