How often should a practitioner assess the skin under the electrodes during treatment?

The frequency of assessing the skin under the electrodes during treatment is essential for ensuring the safety and comfort of the patient. Assessing the skin every session allows the practitioner to monitor any changes in the skin's condition that may occur due to the electrical stimulation. This includes checking for redness, irritation, or any adverse reactions that might develop over time.

By routinely checking during each session, the practitioner can take immediate action if any issues are observed, ensuring that the patient does not experience unnecessary discomfort or potential harm. Additionally, this careful monitoring contributes to the overall effectiveness of the treatment by making sure that the electrical stimulation is being applied safely and appropriately throughout the course of the treatment sessions.

The other options suggest either too frequent assessments, which may disrupt the treatment process, or intervals that are too lengthy, risking the patient's safety and comfort.