When using high frequency during a treatment, what primarily heats up?

Using high frequency during an electrology treatment primarily targets the water in the skin. The high frequency electrical currents generate heat through a process known as dielectric heating, which occurs when the current causes the water molecules within the skin to vibrate. This vibration generates thermal energy, effectively warming the surrounding tissue. The focus on the water content is crucial because it allows for efficient heating of the skin, facilitating various therapeutic effects such as improving circulation and promoting tissue repair.

Other options do not accurately reflect the primary heating mechanism in this context. While air can absorb some heat, it does not serve as the main conductor of the current or the target of the treatment. The needle can become warm due to contact with heated tissues but is not the primary medium heated by the high frequency. Similarly, while the device itself operates to generate the high frequency currents, it is not the focus of the heating process during the treatment. Thus, the effect is predominantly on the water molecules in the skin, making that the correct answer.