Electrology is the practice of electrical epilation to permanently remove human hair. The actual process of removing the hair is referred to as electrolysis.
The practitioner slides a solid hair-thin metal probe into each hair follicle. Proper insertion does not puncture the skin. Electricity is delivered to the follicle through the probe, which causes localized damage to the areas that generate hairs, either through the formation of caustic lye (galvanic method), overheating (thermolysis method), or both (blend method).
The three methods used in electrology; galvanic, thermolysis and blend, all have their own merits. One method is not better than another. The success depends on the type of hair being removed and the condition of the skin.
Most practitioners will advise that complete removal of male pattern facial hair takes between 1 and 4 years, with an average treatment length of 2 years in case of one session per week, one hour per session. Removal of body hair works considerably faster.