Which of the following is an effect of indirect high-frequency application?

• A. Decreases activity of sebaceous and sudoriferous glands.
• B. Increases activity of sebaceous and sudoriferous glands.
• C. Suppresses lymphatic circulation.
• D. Reduces skin respiration.

Answer: (B)

Indirect high-frequency application warms the skin and boosts local circulation and cellular activity. That gentle heat and stimulation wake up the skin’s tissues, which includes the secretory glands. As a result, the sebaceous glands (oil production) and sudoriferous glands (sweat) become more active. The method uses a damp glass electrode held near the skin while the client holds the other electrode, creating a mild, therapeutic effect with increased circulation and metabolism. This approach does not reduce gland activity; it increases it. It also doesn’t suppress lymphatic circulation or reduce skin respiration—both of which would be inconsistent with the warming, circulatory, and metabolic effects produced by this treatment.