What should you know about a TENS unit on the genitals?

TENS electrodes deliver electrical pulses through the skin. Genital tissue is sensitive, and pain in this area can arise from skin irritation, infection, nerve irritation, pelvic-floor problems or another condition needing diagnosis. A home device may not be designed for genital use, and adhesive pads can irritate delicate tissue. Do not assume a setting used on the back or leg is suitable for this area.

Do not apply electrodes to the penis, vulva, vagina, scrotum, testicles or other genital tissue on your own. Check the device instructions and arrange advice from a doctor or pelvic-health physiotherapist. If stimulation has been recommended, ask for the exact electrode location, intensity, session length and cleaning instructions. Switch the unit off before removing pads. Stop immediately for sharp pain, burning, skin swelling, bleeding, numbness or a new change in sensation.

Seek urgent care for severe genital pain, sudden swelling, heavy bleeding, inability to pass urine, fever with feeling very unwell, or a painful erection that does not settle. Arrange prompt medical assessment for sores, discharge, a new lump, persistent burning, or pain after sexual contact. These symptoms require a clinical examination rather than self-treatment with a TENS unit.

Ask what is causing the pain, whether pelvic-floor treatment is appropriate, whether electrodes should be placed on nearby intact skin instead, and how you should protect sensitive tissue. Tell the clinician about pregnancy, implanted devices, reduced sensation, skin conditions and any medicines or procedures affecting the area.