Which treatment modality has a thermal and germicidal purpose when applied to the skin?

The treatment modality that has both a thermal and germicidal purpose when applied to the skin is high frequency. This technique utilizes a specialized machine that produces an electrical current, which creates heat and a gas discharge in the form of ozone. The thermal action increases blood circulation and improves skin metabolism, while the germicidal effect helps to kill bacteria on the skin’s surface. This dual action makes high frequency particularly effective for treating conditions such as acne, as it not only addresses the bacteria but also promotes healing through increased blood flow.

In contrast, while radiofrequency can deliver thermal energy to tighten skin and encourage collagen production, it does not specifically have germicidal properties. Ultrasound is primarily used for deep tissue penetration and can enhance product absorption but does not have a thermal effect for treating bacteria. Microdermabrasion focuses on physical exfoliation and skin rejuvenation but does not involve thermal properties or germicidal effects as part of its primary function.