Local Side Effects Caused by Hair Dye Use in Females: Cross-sectional Survey

Abstract

Background: Despite its association with a number of side effects, hair dye use is common worldwide. Objective: To explore the local side effects of hair dye use and to relate these effects to features of hair dyeing. Methods: A questionnaire about hair dye use was distributed to a random sample of 650 female patients at various outpatient clinics in 2008. Results: A total of 567 females returned the questionnaire (87.2% response rate). Of these respondents, 82.6% (464 of 562) had used hair dye products in the past. The mean age at first use was 22.23 ± 7.05 years, and the median time between two consecutive dyes was 6 months. Of these respondents, 76.8% (354 of 461) used permanent dyes. Participants reported that they suffered skin redness caused by hair dyes (15.1%, 65 of 431), had scaling (14.4%, 60 of 417), or had itchiness (31.3%, 134 of 428). In addition, 74% (262 of 354) of the participants reported that they had issues with the texture or condition of hair following hair dye use; 77.7% (314 of 404) reported split ends, whereas 69.6% (273 of 392) reported hair dryness, 69.4% (256 of 369) lusterless hair, 77.2% (308 of 399) excessive hair loss, and 53.6% (210 of 392) excessive hair graying. Furthermore, 55.1% (196 of 356) of the participants reported a slowing of hair growth. The total number of hair dyeing events was associated with increased hair loss (p = .04) and excessive graying (p < .001) after controlling for all relevant variables. Conclusion: Hair dye is associated with local side effects to the skin and hair. Increased public awareness of these risks could help inform consumer choices and reduce excessive use.