To use a TENS machine safely, always turn the device off before applying or removing sticky pads, ensure a strong but comfortable tingling sensation without pain, and never place electrodes on the neck, chest, head, or broken skin. Setup and Application - Clean skin: Wash and dry the skin area before placing the pads. - Position pads: Place pads around the painful area at least 1 inch (2.5 cm) apart. - Pads must never touch each other. - Adjust intensity: Turn on the machine and slowly raise the dial until you feel a firm, comfortable tingle or buzz. It should never hurt or cause strong muscle jerking. - Session length: Use for 30 to 60 minutes at a time, several times a day. Turn the unit off before removing the pads. Safety Warnings and Restrictions - Never use on: The front of the neck, eyes, head, heart, chest, or across both sides of the torso simultaneously. - Skin condition: Avoid broken, swollen, infected, or numb skin. - Activities: Do not use while sleeping, driving, bathing, or showering. - Medical check: Consult a doctor first if you are pregnant, have a pacemaker, heart problems, or epilepsy.