Kara, a client, wants a sodium hydroxide relaxer. During consulation, her stylist finds out Kara had an ammonium thioglycolate relaxer service done on her hair last week. How should Kara's stylist proceed?

Most states require cosmetologists to take a two-part exam to become licensed or certified.  The first part is a written multiple-choice exam covering subjects like skin structure, nail structure, haircutting, facials and sanitation. The second part is a hands-on exam where a cosmetology candidate needs to demonstrate knowledge and skill in like haircutting, color application and manicure.