Galvanic electrolysis is the oldest method. “Galvanic” is a natural chemical method that utilizes direct current (dc) to convert normal body salt and water in the follicle into a compound which destroys the growth center of the hair. It is also known as “multiple needle”.
Thermolysis (also known as short wave) uses high frequency current to cauterize the growth center of the hair follicle. There are two types of thermolysis: 1)flash or automatic and 2)manual. Flash uses a high current at a split second impulse while manual uses a lower intensity current for several seconds.