been shown to be the largest inhalation exposure in hair salons, with the greatest concentrations occurring while mixing hair dyes and with use of hair sprays. Other notable respiratory exposures included ethanol, ammonia, and formaldehyde. The concentration of exposure was generally found to be a function of the presence or absence of ventilation in the area in which they were working. Studies have exhibited an increased rate of respiratory symptoms experienced such as cough, wheezing, rhinitis, and shortness of breath among hairdressers when compared to other groups. Decreased lung function levels on spirometry have also been demonstrated in hairdressers when compared to unexposed reference groups. Dermal Contact dermatitis is a common dermatological diagnosis affecting hairdressers. Allergen sensitization has been considered the main cause for most cases of contact dermatitis in hairdressers, as products such as hair dyes and bleaches, as well as permanent curling agents contain chemicals that are known sensitizers. Hairdressers also spend a significant amount of time engaging in wet work with their hands being directly immersed in water or by handling of wet hair and tools. Overtime, this type of work has also been implicated in increased rate of irritant dermatitis among hairdressers due to damage of the skins natural protective barrier See also Asymmetric cut Hairstyle List of hairstyles Hollywood Makeup Artist and Hair Stylist Guild Awards References Personal care and service occupations Fashion occupations Articles containing video clips