The use of electrical currents to treat the skin is commonly referred to as _____.

• A. Phototherapy
• B. Sonotherapy
• C. Thermotherapy
• D. Electrotherapy

Answer: (D)

Using electrical currents to treat the skin is called electrotherapy. In esthetics, devices deliver specific currents to achieve effects like muscle stimulation, improved circulation, and enhanced penetration of active ingredients. This is different from phototherapy, which uses light energy; sonotherapy, which uses sound waves; and thermotherapy, which uses heat. Electrotherapy includes modalities such as microcurrent for toning and galvanic current for driving ingredients into the skin.