What hair reduction method requires the technician to insert a small needle (probe) into a hair follicle?

The method that requires the technician to insert a small needle (probe) into a hair follicle is electrolysis. This hair removal technique involves the use of an electric current to destroy the hair follicle, preventing future hair growth. During the procedure, the probe is precisely inserted into the follicle, allowing for direct application of the current to the hair root. This targeted approach is effective for individuals seeking permanent hair removal, as it treats each hair follicle individually.

In contrast, methods such as laser and depilation do not involve inserting any instrument into the hair follicle. Laser hair removal relies on light energy to target the pigment in the hair and does not require any physical insertion. Depilation refers to the removal of hair above the skin’s surface, commonly achieved through shaving or using depilatory creams, and again does not involve the follicle itself. Epilation refers to a broader category that includes methods that remove hair from the root, such as waxing and tweezing, but does not specify the use of a probe or needle as in electrolysis.