What should you know about TENS and muscle stimulators?

TENS means transcutaneous electrical nerve stimulation. It is commonly used to change how pain signals are felt and may make movement more comfortable. A muscle stimulator is designed to produce a contraction in a selected muscle, which can support activation during rehabilitation. Some home devices offer both settings, so the name on the box does not tell you which programme is appropriate.

Pads should sit on clean, intact skin around the area being treated, with placement and intensity guided by the device instructions or a physiotherapist. A tingling sensation may be expected; sharp, burning, or worsening discomfort is a reason to stop.

Confirm the device type, programme, pad position, and session length with a clinician when the pain is new, persistent, or linked to weakness. Start at a low setting and increase only to a comfortable level. Check the skin after removing the pads, keep electrodes clean, and do not use a damaged cable or pad.

Do not place pads over broken or infected skin, the front of the neck, or across the chest. Ask for medical advice before use if you have an implanted electrical device, reduced sensation, or are pregnant.

Arrange an assessment if pain is limiting sleep or daily activity, if weakness or numbness is developing, or if symptoms keep returning after the device is stopped. Seek urgent care for sudden loss of strength, new bladder or bowel control problems, severe injury, or chest symptoms.

Ask which device setting matches your goal, where each pad should go, how long a session should last, and whether the device fits alongside your exercises or medicines. Also ask which symptoms mean you should stop using it.