Arkansas Esthetician Practice Exam

Which method involves inserting a single needle into the hair follicle?

1. Galvanic method

2. Thermolysis

3. Multiple needle method

4. Shaving

The correct answer is: Thermolysis

The method that involves inserting a single needle into the hair follicle is the galvanic method. This technique uses a direct current that causes a chemical reaction in the hair follicle, resulting in the permanent removal of hair. By inserting a single needle, the esthetician can target individual hairs, making it a precise and effective approach for hair removal. Thermolysis, while also a common hair removal technique, typically uses an alternating current and generates heat to destroy the hair follicle. It does not specifically focus on a single needle but can use a probe to treat one or several follicles simultaneously. The multiple needle method utilizes several needles to treat multiple hair follicles at once, which differs significantly from the single-needle approach of the galvanic method. Shaving simply removes hair at the skin's surface and does not affect the hair follicle itself. Thus, the galvanic method is correctly identified as the technique that specifically involves inserting a single needle into the hair follicle for effective hair removal.