What type of electrical current is described as high frequency?

High frequency refers to alternating current, which oscillates at a specific rate to produce electrical waves. In the context of esthetics, high frequency treatments involve this alternating current, which is commonly used for facial treatments, including acne treatments and skin rejuvenation. The oscillation of the current can create thermal and ionic effects, often leading to improved skin health by stimulating the tissues, increasing circulation, and promoting better absorption of skin care products.

Direct current, on the other hand, flows in one direction and does not have the oscillatory nature that defines high frequency. Static current is not typically used in esthetic treatments and refers more to a build-up of electrical charge. Microcurrent refers to a very low level of electrical current used in cosmetic applications, but it is not classified as high frequency. Therefore, alternating current is the appropriate choice when discussing high-frequency electrical treatments in esthetic practices.