A needle is inserted into each individual hair follicle then electricity is applied. This method is painful, time-consuming, and expensive. Electrolysis can sometimes cause folliculitis, infection, or scarring. To be successful multiple treatments are required. Typically once weekly for up to one year.
Medical lasers are available that can effectively treat the hair follicles using laser light.
They can disable the follicles so hair will not grow while avoiding damage to the surrounding skin. This method is more efficient, rapid and safe. It is also more comfortable. Several early hair removal lasers had variable results. The most advanced systems now in use are the Ruby and Alexandrite lasers.