Transdermal/Transcutaneous electrolysis, also called transdermolysis, non-invasive electrolysis, or no-needle electrolysis, is a method that consists of putting a conductive gel on the area containing the hairs to be treated. With transdermal electrolysis an electrified cotton swab is applied to the gel, and with transcutaneous electrolysis, an electrified adhesive patch is used.
The theory is the electricity, helped by the gel is passed down the hair shaft, and kills the cells in the hair follicle, preventing the hair from growing back. The Evidence suggests that this is not the case. The 'gel' being highly conductive, disperses the electric charge over the entire area that it covers. This reduces the effectiveness of the treatment, unless higher electrical charges are used. A higher charge gives rise to an increase in the likelihood of injury, and/or pain from the treatment. The skin has a lower electrical resistance than hairs do, and so most of the charge will pass into the skin, and an even higher electrical charge will then be needed for the treatment to be as effective as it is claimed.
I have never tried this form of treatment myself so I cannot say whether the treatment is really effective or not. I shall leave you to draw your own conclusions about this form of treatment, but from my own point of view, it reminds me too much of the torture scenes they, show in certain movies I have seen.