Micro currents unit current uses which type of electrical current?

• A. Alternating current
• B. Direct current
• C. Pulsed current
• D. Mixed current

Answer: (A)

Microcurrent therapy uses an alternating current because it provides a gentle, bidirectional signal that mirrors the body’s own electrical activity. By reversing direction, alternating current prevents buildup of ions at the skin–electrode interface, reducing irritation and the risk of tissue changes that a constant one-way flow from direct current could cause. This allows the use of very small intensities while keeping the sensation comfortable and the treatment safe for facial and cosmetic work. Some devices deliver brief bursts or pulses, but the waveform remains alternating rather than a unidirectional direct current.