This method of electrolysis uses heat to destroy the hair follicle. It is faster than the galvanic method and because it uses an indirect (oscillating) current which constantly changes in polarity (direction), unlike the galvanic method, a bar is not required to be held. The high frequency current is applied to the hair follicle via a fine probe (or needle) causing heat to be produced in the hair follicle, thereby destroying it, allowing the hair to be easily removed. A momentary sensation of heat is felt during treatment, each time a hair is treated.
This sensation varies according to the area of the body being treated and from person to person. A topical anaesthetic can be purchased from a pharmacist and applied prior to treatment to reduce this sensation if required.