Several small, flat rubber adhesive discs (called electrodes) are put on your skin. Sometimes rubber suction cups (called vaso pneumatic devices) are put on your skin, too.
High frequency alternating electrical currents are applied to the electrodes. The currents move through the skin quickly with little discomfort. During treatment, your response is tracked.
You may feel some tingling, but it's shouldn't be uncomfortable. If the sensation becomes too strong, please tell the clinician right away.