TENS for endometriosis pain: a tool you control yourself

TENS (transcutaneous electrical nerve stimulation) is a small portable device. It sends mild electrical impulses through the skin, using adhesive electrodes placed on the lower abdomen or the lower back.

This is not a gadget. This medical device has been used for decades in rehabilitation, pain centers, and maternity wards. Medical societies recognize it as a complementary option for chronic pain ^[1]. The European guidelines (ESHRE) list complementary therapies among the options to consider for endometriosis pain ^[2].

You stay fully in control: you choose the intensity, the duration, and the timing. The sensation is a simple tingling, never painful.

TENS works on the pain circuit on two levels.

First, gate control. Picture a gate in your spinal cord: it lets pain signals pass through to the brain, or blocks them. By stimulating the fast touch fibers, high-frequency TENS (50 to 120 impulses per second) closes that gate, so the pain message gets through less easily ^{[3] [4]}. It is the same reflex as rubbing an elbow you just bumped.

Second, endorphins. Low-frequency TENS (1 to 10 impulses per second) prompts your body to release its own natural painkillers, close to morphine ^{[4] [5]}.

This dual action matters with endometriosis. The pain there combines several mechanisms: inflammation, nerve damage, and a nervous system that ends up amplifying signals, known as central sensitization ^[6]. Like an alarm that goes off at the slightest draft. TENS acts directly on this nerve circuit, where a single medication is often not enough ^{[4] [5]}.

You deserve honest data, not sugar-coated promises.

The strongest study is a 2020 randomized trial (Mira team), run in women with deep endometriosis, one of the most painful forms ^[7]. One group used a real TENS, the other a placebo device, identical but inactive. The real TENS significantly reduced pelvic pain, pain during intercourse (deep dyspareunia), and bowel pain ^[7].

Two reviews point the same way: a 2018 review calls TENS promising for endometriosis pain ^[8], and a 2022 meta-analysis covering 381 studies confirms it reduces pain versus placebo across many chronic pain conditions ^[1].

The limits matter just as much. Trials specific to endometriosis are still few, sample sizes are modest, and long-term follow-up is lacking ^[8]. Results vary from one woman to another. What can be said: the data are encouraging, the mechanisms are well understood, and the safety profile is excellent ^[1].

TENS adds to your care, it does not replace it. Here are concrete pointers, to fine-tune with your doctor or physiotherapist.

Where to place the electrodes, depending on the day's pain:

• on the lower abdomen, just above the pubic bone;
• on the lower back, at the sacrum, for pain that radiates.

Which settings: high frequency relieves quickly during a flare-up, low frequency acts more slowly but lasts longer. The intensity should stay clear but comfortable, never painful. Sessions last 20 to 60 minutes, several times a day if needed ^{[7] [4]}.

Its strengths: no substance circulates through the whole body, no risk of dependence, and you are the one who decides ^[1]. The only reported issue is minor skin irritation under the electrodes.

A few precautions: TENS is not advised with a pacemaker, with uncontrolled epilepsy, or on the abdomen during pregnancy. It is compatible with an intrauterine device. In many countries it can be prescribed and partly reimbursed for chronic pain.