What type of current is referred to as high frequency?

High frequency refers to alternating current, which is characterized by its ability to change direction periodically. In the context of electrical modalities used in aesthetics, high-frequency currents typically operate at frequencies above 1,000 hertz, allowing them to facilitate various skin treatments, such as acne therapy, and promote healing by stimulating circulation and cellular metabolism.

Alternating current (AC) is different from direct current (DC), which flows in a single direction. Alternating current is essential in many aesthetic devices because it can effectively penetrate the skin and has physiological effects that are beneficial for treatment purposes. Pulsed current, while often used in certain applications, does not specifically represent high frequency in the same way that alternating current does. Wave current does not denote a specific type of electrical activity in this context. Thus, when referring to high frequency in aesthetics, it is closely associated with alternating current.