Vagus Nerve Stimulation (VNS)
Vagus comes from the Latin word for wandering, and it suits. This nerve travels from the base of the brain, down through the neck, and branches out to the heart, lungs and gut, carrying messages in both directions.
Lately, the vagus nerve has become something of a wellness celebrity. Social media is full of devices, cold plunges and humming routines promising to “reset” it. Vagus nerve stimulation, or VNS, is something more specific: a medical treatment that sends small electrical pulses to the nerve. The science behind it is more careful than the hype, and in some ways more interesting.
What is it?
01There are two main ways to deliver VNS. They use different devices and have been studied for different purposes.
Implanted VNS. A surgeon places a small device under the skin of the chest and connects a wire to the vagus nerve in the neck. Implants are used in specialist care for epilepsy and have been studied for severe depression that hasn’t improved with other treatments.
Non-invasive VNS. An earpiece or handheld device delivers pulses through the skin at the ear or side of the neck, depending on the model. The devices used in studies have specific settings and instructions.
What may it help with?
02Non-invasive VNS is being explored for people who struggle to wind down, sleep or settle after stress.
Studies have looked at sleep quality, anxiety symptoms and how strongly the body reacts to stressful reminders.
Implanted VNS is a separate option studied in people with long-standing depression that has persisted despite several treatments.
How does it work?
03The vagus nerve is part of the parasympathetic nervous system, which helps regulate functions such as heart rate and digestion. Many of its fibres also carry information from the body back to the brain.
Researchers are looking at whether stimulating the nerve can influence brain networks involved in responding to stress and settling afterwards.
If you want to explore how the nervous system relates to feeling safe and connected, see our Polyvagal-informed practice page.
What does the evidence say?
04The findings below come from specific devices and treatment schedules.
Sleep and anxiety
In a trial of 72 adults with chronic insomnia, eight weeks of stimulation at the ear improved sleep quality more than sham stimulation, which mimics treatment. Anxiety scores also improved more as a secondary finding in the same insomnia trial [1].
The body’s response to stress
In a small trial of 25 people with PTSD, stimulation at the neck reduced some physical signs of the stress response during laboratory tasks compared with sham stimulation [2].
Implanted VNS for depression
In the year-long RECOVER trial of 493 adults with severe, hard-to-treat depression, some patient and clinician ratings favoured active implanted VNS, while the trial’s main depression measure was similar in both groups [3].
What does treatment look like?
05Non-invasive VNS
Depending on the device, you wear an earpiece or hold a small stimulator against the side of your neck. Session length and settings vary by model.
If you’re exploring it for winding down, pay attention to what you notice during and after a session, and how you sleep that night.
Choosing a device
Look for evidence on the exact model and what you want help with. Check where it’s meant to be used, how long a session lasts and what support is available if you have questions.
Implanted VNS
A specialist team assesses whether an implant might suit you. After surgery, a clinician programs the device and adjusts it at follow-up appointments. The device delivers pulses automatically alongside your existing care.
Risks and considerations
06Non-invasive devices. Use the settings and session length specified for your device. Ear stimulation can cause temporary tingling, local discomfort or headache [4].
Some neck stimulators can’t be used with a pacemaker or other implanted electronics. If you have an implant or heart rhythm condition, check the device instructions and ask your treating clinician before use [5].
Implanted devices. An implant involves surgery and follow-up. Hoarseness, coughing or throat discomfort can occur during stimulation [6].
Questions to ask
07About a non-invasive device
- Has this exact model been studied for what I want help with?
- Is it suitable with my health conditions or any implanted devices?
About implanted VNS
- Is implanted VNS available and appropriate for me in Australia?
- Who would manage the device settings and follow-up?
Founder’s Insight
“When I’ve been on edge, I’ve felt my body start to settle.”
I’ve tried a couple of vagus nerve stimulation devices. I’ve used them when my anxiety was running high and during periods of PTSD when I felt completely frozen. What I noticed was a sense of peace in my body. I felt calmer while using them, and afterwards I often felt sleepy and found it easier to drift off.
There are so many devices now, and I think it’s worth taking the time to look into the one you’re considering. For me, there’s value in having something I can reach for when I need help settling and feeling a little safer in my body.
Founder, The Mental Wealth Hub
You’ve read about it. Now what can you actually do?
You don’t need to have the perfect plan. Choose the next step that feels most useful for where you are right now.
Always speak with a qualified health professional before starting something new. If you are struggling right now, find immediate support.
Want to keep exploring?
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This is educational information. It is not a recommendation that this approach is right for you. Always speak with a qualified health professional.
