Due to whiplash from a car accident my aunt becomes sick from the pressure of the shampoo bowl against her neck. Some people are very sensitive to strong odors and perms and other hair treatments could trigger migraines. When I was in management one of the women wore too much Estee Lauder "Youth Dew" and if she stopped by my office and stayed for more than a few minutes I was soon on my way to a migraine. I think most styling shops are toxic nightmares.