Galvanic current is used to create two significant reactions in esthetics: chemical (disincrustation) and ionic (iontophoresis).
Galvanic facial machines
convert oscillating current from an electrical outlet into a direct
current. Electrons are then allowed to flow continuously in the same
direction. This creates a relaxation response that can be used to
target specific nerve endings in the epidermis. Read more about Galvanic current.