Cosmetology is the study and application of beauty treatment. Branches of specialty including hairstyling, skin care, cosmetics, manicures/pedicures, and electrology. Titles of cosmetologists Hair stylist A hair stylist specializes in the styling of hair, including cutting, chemical perms (relaxers, curls, waves and colour treatments). Shampoo technician A shampoo technician shampooes and conditions a client's hair in preparation for the hair stylist. A shampoo tech may assist with rinsing perm… (More on Cosmetology)