What type of treatment typically involves the use of high frequency currents?

The treatment that typically involves the use of high frequency currents is facial rejuvenation. High frequency therapy uses electrical currents to produce heat and stimulate various biological processes in the skin, aiding in improved circulation, enhanced metabolism, and increased collagen and elastin production. This method is popular in aesthetic treatments for conditions such as acne, enlarged pores, and overall skin texture improvement. It can also help in tightening the skin and giving it a more youthful appearance, which is essential in facial rejuvenation practices.

Other treatments mentioned, such as electrolysis, focus on hair removal through galvanic currents or thermal effects. Galvanic treatments utilize a continuous direct current for various purposes, including product infusion and muscle stimulation, but do not specifically use high frequency. Ultrasound therapy employs sound waves for deep tissue treatment and does not involve high frequency currents in the same capacity. Thus, facial rejuvenation is the most relevant answer in this context.