What should you know about a TENS unit device?

TENS stands for transcutaneous electrical nerve stimulation. A small battery-powered controller sends pulses to electrodes attached to the skin. You choose from the settings available on the device, but a stronger setting is not automatically more helpful. The expected sensation is a comfortable tingling; TENS should not feel like a painful shock. It can be part of a plan for some types of pain, yet it cannot confirm a diagnosis or repair injured tissue.

Different models vary in controls, programmes, electrode size, and instructions. Read the manual for your model and obtain a demonstration if you are unsure.

Place electrodes only as instructed on clean, intact skin. Keep them away from the front of the neck, across the chest, the head, eyes, and damaged or numb skin. Turn the controller off before moving pads, keep the unit away from water, and remove it before sleep unless a clinician has specifically instructed otherwise. Replace worn pads and stop if the skin becomes irritated. Tell a clinician about implanted electronic devices, epilepsy, pregnancy, poor sensation, or circulation problems before starting.

Seek urgent help for new severe weakness, spreading numbness, chest symptoms, fainting, a serious injury, or rapidly worsening pain. Arrange a review when pain persists, changes pattern, or limits daily activities despite the agreed plan. Stop using the device for burning, blistering, a persistent rash, unusual palpitations, or any symptom that concerns you.

Ask whether TENS suits your diagnosis, which programme and intensity to try, where electrodes belong, how long a session should last, and how to combine it with exercise or other treatment. Confirm how to clean and store your particular device.