A TENS unit can be placed in several locations to help reduce anxiety, depending on whether you’re targeting the vagus nerve directly or relieving the muscle tension that anxiety creates. The three most studied placements are the ear (specifically the tragus), the inner wrist over the median nerve, and the back of the neck. Each targets a different part of the nervous system, and you can use more than one approach.
The Ear: Vagus Nerve Stimulation
The most direct way to use electrical stimulation for anxiety is through the ear, where a branch of the vagus nerve runs close to the skin’s surface. The vagus nerve is the main communication line between your brain and your body’s “rest and digest” system, so stimulating it can shift your nervous system away from the fight-or-flight state that drives anxiety.
The primary target is the tragus, the small flap of cartilage that sticks out in front of your ear canal. An alternative spot is the cymba conchae, the upper hollow of your outer ear just above the ear canal opening. Both areas are supplied by the vagus nerve’s auricular branch. Standard TENS pads are too large for the ear. You’ll need a small ear clip electrode that attaches to the tragus, similar in shape to an earbud. Some TENS units are sold with these clips included, and standalone ear clip electrodes are available separately. Researchers at the University of Oklahoma have used this type of clip-on-tragus setup to successfully stimulate the vagus nerve in clinical studies.
For ear placement, keep the intensity low. You should feel a gentle tingling or buzzing but no pain. Most protocols for vagus nerve stimulation through the ear use settings in the low-frequency range (around 1 to 25 Hz) with short sessions of 15 to 30 minutes.
The Wrist: Median Nerve Stimulation
Placing electrodes over the right median nerve, which runs along the inner wrist, has shown strong results for generalized anxiety. In a controlled study of 121 patients with generalized anxiety disorder, daily stimulation of the right median nerve for 30 days reduced anxiety scores by an average of 42.4%, compared to just 13.5% in a placebo group. That benefit lasted at least two months after treatment ended, and patients who continued with once-weekly maintenance sessions held their improvement for the full six-month follow-up period.
To find the median nerve, place one electrode on the inside of your right wrist, roughly centered between the two tendons you can feel when you flex your hand. Place the second electrode a few inches further up your inner forearm. The study tested two settings: high-frequency stimulation at 50 Hz and low-frequency stimulation at 1 Hz. Both worked significantly better than placebo, but low-frequency stimulation outperformed high-frequency by about 51%. Low-frequency stimulation also produced measurable changes in brain wave activity, increasing calming alpha rhythms and decreasing the faster beta rhythms associated with anxiety and hyperarousal.
The Neck: Cervical Nerve Stimulation
Placing electrodes on the back of the neck at the base of the skull targets the cervical nerve plexus, a bundle of nerves that exits the spine around the C2 to C4 vertebrae. This approach has been studied for both anxiety and sleep problems simultaneously. In research on anxiety-related sleep disturbances, a neurostimulator placed at this level reduced anxiety and improved sleep quality. The neck placement is particularly worth trying if your anxiety is worst at night or disrupts your sleep, since it appears to address both problems through the same pathway.
Position two small electrodes on either side of your spine, just below the hairline at the back of your neck. The electrodes should sit about an inch apart, flanking the midline. Start at a low intensity and increase gradually until you feel a comfortable tingling sensation.
Shoulders and Upper Back: Releasing Tension
Anxiety often parks itself in your body as tight, aching muscles across your shoulders and upper back. While this placement doesn’t target the nervous system pathways involved in anxiety itself, it breaks the feedback loop where physical tension reinforces the feeling of being stressed and on edge.
Place two electrodes (5 cm by 5 cm pads work well) on your upper trapezius muscles, one on each side, over the most tender or tight spot between your neck and shoulder. A good reference point is the bony tip of your shoulder, called the acromion. Position the pads between that point and your neck, directly over the muscle bulk where you feel the most tightness. Standard TENS settings for muscle tension relief (50 to 100 Hz, moderate intensity) work fine here.
Settings That Matter for Anxiety
TENS units designed for pain relief typically default to high-frequency settings (50 to 100 Hz) with short pulse widths around 50 to 200 microseconds. These settings work through different brain chemistry than what helps anxiety most. High-frequency stimulation primarily triggers the release of certain pain-blocking compounds in the spinal cord, while low-frequency stimulation (1 to 4 Hz) activates serotonin receptors and the body’s natural opioid system, both of which play a role in mood regulation and calm.
Based on the available research, low-frequency stimulation in the 1 to 4 Hz range with a longer pulse width (200 to 400 microseconds) appears to be the better choice for anxiety. If your TENS unit has adjustable settings, start at 1 to 2 Hz and a pulse width of 200 microseconds. The intensity should produce a noticeable sensation, a rhythmic pulsing you can clearly feel, but should never be painful.
Sessions of 20 to 30 minutes are a reasonable starting point. You can generally use a TENS unit multiple times per day for up to 60 minutes per session. The clinical trial showing a 42% reduction in anxiety symptoms used daily 30-minute sessions over 30 days, so consistency matters more than marathon sessions.
How TENS Affects Anxiety in the Body
Electrical stimulation doesn’t just distract you from anxious feelings. It triggers real chemical changes. TENS activates the release of several calming neurochemicals, including serotonin (which regulates mood), GABA (the brain’s main inhibitory signal, which quiets overactive neural circuits), and the body’s own opioid-like compounds. Low-frequency TENS specifically engages serotonin receptors that are involved in anxiety regulation, which likely explains why it outperforms high-frequency stimulation for this purpose.
The brain wave changes observed in the generalized anxiety study tell a similar story. After low-frequency TENS, patients showed a 24% increase in alpha wave activity in the back of the brain (associated with relaxed wakefulness) and a 28% decrease in fast beta wave activity in the frontal and temporal regions (associated with worry and rumination). These are the same shifts you’d expect from an effective anti-anxiety intervention.
Safety Zones to Avoid
Never place TENS electrodes on the front or sides of your neck. The carotid sinus sits at the point where the carotid artery splits into two branches, roughly at jaw level on each side of your throat. This structure contains pressure-sensitive receptors that help regulate heart rate and blood pressure. Electrical stimulation in this area can trigger a dangerous drop in heart rate or blood pressure. If you’re using the back-of-neck placement, keep the electrodes centered on the back of your neck, well away from the sides.
Other areas to avoid include directly over your chest or heart, over broken or irritated skin, and over any implanted device like a pacemaker or insulin pump. Pregnant women should avoid TENS on the abdomen and lower back.