Which type of current is referred to as high frequency in esthetics?

In esthetics, high frequency refers specifically to alternating current. This type of current is characterized by its ability to rapidly switch directions, producing a frequency typically between 100,000 to 200,000 hertz. This unique property allows high-frequency currents to create thermal effects that can benefit the skin through increased blood circulation, improved oxygenation, and enhanced metabolism in the treatment of various skin conditions.

High-frequency treatments are commonly used for stimulating the scalp or treating acne and other skin imperfections. The alternating nature of this current is particularly effective in creating the oscillation needed for these therapeutic benefits.

In contrast, direct current provides a steady flow of electricity in one direction, which is not typically associated with high-frequency treatments. Sinusoidal current is also an alternating current but is characterized by a more complex waveform that is less commonly defined as high frequency in esthetics practice. Pulsed current involves interrupted flow, which does not align with the continuous wave needed to define high-frequency current in this context. Thus, high frequency is best understood as a type of alternating current used for various aesthetic treatments.