What term describes the method of hair removal that involves inserting a single needle into a hair follicle?

The method of hair removal that involves inserting a single needle into a hair follicle is known as electrolysis. This technique is based on the principle of using an electrical current to destroy the hair follicle's ability to grow hair. During the process, a fine needle is inserted into the follicle, and the electrical current is applied, effectively disabling the follicle. This method is recognized for being a permanent hair removal solution and is especially effective for individuals looking to achieve long-lasting results.

In contrast, tweezing involves plucking individual hairs from the skin's surface without targeting the follicle directly or utilizing any electrical means. Thermolysis, on the other hand, is a method of electrolysis that uses heat instead of a direct electrical current to destroy the hair follicle; it typically involves the application of high-frequency energy. Shaving is a temporary hair removal method that merely cuts hair at the surface level and does not affect the follicle itself.