Anxiety, the Nervous System and Acupuncture: What We Know
Anxiety and the nervous system: what research explores about acupuncture as a complementary approach, with its limits, in Montreal.
Clinically reviewed by Justin Lapointe, member of the OAQ · August 8, 2026
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You’re anxious, but you function anyway
You’re not in crisis. You work, you look after the people close to you, you hold on. But something inside doesn’t come back down.
Your shoulders are raised by default. Your breathing is shallow for no reason. You fall asleep, but at 3 a.m. you’re staring at the ceiling, your brain replaying a conversation from last Tuesday. On Sunday evening, the dread is waiting for you like a standing appointment. When someone asks whether everything is fine, you answer “yes, just tired,” because it’s simpler than explaining the diffuse, persistent sensation of being always a little on guard.
This experience is more common than people think: a persistent anxiety that doesn’t stop you from functioning. You hold on, but at a cost. It has no label of its own in the classifications; it is no less real for that. It’s neither a whim nor a weakness of character. Researchers describe it as an imbalance of the autonomic nervous system: the one that manages your heart rate, your digestion, your breathing and your sleep without asking your permission. That’s the system research studies as a possible target of acupuncture.
What science understands about chronic anxiety
A nervous system stuck in “alert” mode
Your autonomic nervous system has two main modes. The sympathetic, your accelerator, prepares you for action: heart speeding up, muscles tensing, digestion slowing, vigilance rising. The parasympathetic, your brake, whose main branch is the vagus nerve, brings you back into recovery mode: heart slowing, muscles releasing, digestion resuming, sleep settling in.
In a balanced life, these two modes alternate continuously. In chronic anxiety, the accelerator stays pressed down, even at night, even at rest. Researchers speak of sympathetic dominance and low vagal tone. In plain terms, your body no longer has access to its recovery mode.
The HPA axis and the cortisol that no longer comes down
This sympathetic dominance activates a second system: the hypothalamic-pituitary-adrenal axis (HPA), which secretes cortisol, the stress hormone. Short term, that’s useful: cortisol mobilizes energy, sharpens attention, prepares action. But when it becomes chronic, cortisol that stays high all day and doesn’t drop enough at night explains a large part of the physical symptoms of chronic anxiety: unrefreshing sleep, abdominal weight gain, weakened immunity, digestive troubles, rumination.
| WHAT THE RESEARCH SAYS Generalized anxiety: A meta-analysis of 20 randomized clinical trials (Yang et al., 2021, Annals of General Psychiatry) reports, in patients with generalized anxiety disorder, a small-to-moderate effect on anxiety symptoms (SMD −0.41), with good tolerance, but with important limits: 18 of the 20 trials were conducted and published in China, and the comparators were often without sham acupuncture. Encouraging results, to be read with caution. Situational anxiety: A meta-analysis of 14 trials (Bae et al., 2014, Evidence-Based Complementary and Alternative Medicine) shows a significant reduction in preoperative anxiety in more than 1,000 patients, compared with sham acupuncture. Mechanisms: Several recent works (e.g. the meta-analysis by Hamvas et al., Complementary Therapies in Medicine, 2023) document the action of acupuncture on the vagus nerve, heart rate variability, and regulation of the HPA axis. Note: these studies concern specific clinical contexts. They do not mean that acupuncture replaces psychiatric or psychological treatment for severe anxiety disorders. |
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How acupuncture might act
1. Engaging the vagus nerve
Several acupuncture points, notably those of the outer ear and certain distal points on the limbs, are innervated by branches of the vagus nerve or activate its central circuits. According to several studies, stimulating these points may increase heart rate variability (HRV), a reliable marker of vagal tone and of the body’s capacity to recover from stress.
2. Modulating cortisol
Some studies report a drop in salivary cortisol after a session, but results remain uneven from one study to another. The effect depends mostly on the broader context of your life: sleep, diet, mental load.
3. Releasing the tensions of anxiety
Chronic anxiety leaves physical traces: trapezius muscles hard as boards, a jaw clenched at night, a blocked diaphragm that prevents deep breathing. By releasing these areas, acupuncture might send the brain a feedback signal: “the danger has passed, you can let go.” This is one of the mechanisms patients notice most readily.
4. Reopening the “pause”
What most patients describe after a few sessions is not that the anxiety disappears, but that it becomes livable again. The inner agitation drops a notch. Sleep deepens. Rumination loses intensity. The nervous system regains access to its recovery mode.
The view from traditional Chinese medicine
Traditional Chinese medicine (TCM) doesn’t speak of “anxiety” in the Western clinical sense. It describes disturbances in the circulation of Qi that produce the symptoms you recognize:
- Liver Qi stagnation: frustration, swallowed anger, irritability. Chest tension, sighing, difficult menstrual cycles, a clenched jaw.
- Heart Yin deficiency: inner agitation, thoughts that turn, the inability to rest. Light sleep, palpitations, dry mouth, the feeling of being “wired.”
- Kidney deficiency: fear, deep exhaustion, a lack of vital force. Tired lower back, sensitivity to cold, fear of the future, dizziness.
- Spleen deficiency: rumination, worries that won’t let go, digestive fatigue. Heaviness after meals, bloating, a foggy mind.
Most anxious patients present a combination of several of these patterns, often Liver stagnation + Kidney deficiency, or Heart Yin deficiency + Spleen deficiency. The acupuncturist’s job is to identify the precise mix that fits you, through observation, the pulse and the tongue, then to choose the points that restore circulation.
| THE SCIENCE ↔ TCM BRIDGE What research describes as sympathetic dominance, Chinese medicine reads, within its own frame, as Yang that does not come back down; what research measures as low vagal tone evokes, in that reading, a Heart Yin that no longer anchors the Shen. These two languages are not equivalent, but each can shed a different light on the same clinical experience, and both invite you to bring the system back to calm rather than fight it. |
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What a course of treatment looks like
A first session runs 75 to 90 minutes, depending on the practitioner. It begins with an in-depth discussion: your history, your symptoms, your rhythm of life, your sleep, your digestion. The acupuncturist observes your tongue, takes your pulses, and draws up an assessment according to Chinese medicine that guides the choice of points.
The treatment itself is gentle: between 10 and 20 fine needles, inserted at precise points on the body, the ears, sometimes the scalp. You stay lying down, quietly, for 25 to 30 minutes. Most patients fall asleep or enter a state close to deep meditation.
For established chronic anxiety, we generally recommend a series of closely spaced sessions (60 to 70 minutes, weekly at first), followed by a gradual spacing out. Improvement is rarely spectacular at the outset; when it comes, it settles in stages, often on sleep first, then on inner agitation, then on emotional resilience in situations that used to be triggering.
| WHEN ACUPUNCTURE IS NOT ENOUGH Acupuncture is a complement, not a replacement. If you are living through one of the following situations, your first step should be medical or psychological care: • Suicidal thoughts or thoughts of self-harm • Frequent or disabling panic attacks • Anxiety that prevents you from functioning (work, relationships, going out) • Depression accompanying the anxiety • A diagnosed anxiety disorder requiring medication In Québec, Info-Social 811 offers a confidential listening service 24/7. In a crisis: 1 866 277-3553 (Québec suicide prevention line). Your family doctor or your GMF can also refer you. Acupuncture fits very well alongside these paths; it doesn’t compete with them. |
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The anxiety profiles most often seen in clinic
The mentally hyperactive profile
A brain that never switches off. Endless mental lists. Difficulty falling asleep. Often associated with office syndrome: a hunched posture, screens all day, little physical activity. Treatment aims to bring the energy down from the head into the body and to release neck tension.
The somatic anxiety profile
Anxiety expresses itself in the gut: irritable bowel, bloating, a knot in the stomach, nausea before important appointments. Treatment incorporates digestive points and works on the Liver Qi stagnation that “attacks” the Spleen.
The exhaustion-anxiety profile
Often after a burnout, after a pregnancy, around midlife, or following a prolonged period of overload. The person is at once too tired to recover and too tense to rest. Treatment nourishes the Kidney Yin before attempting to calm the Yang.
The hormonal anxiety profile
Linked to the menstrual cycle, to perimenopause or to the postpartum period. Anxiety fluctuates with the hormones. Treatment combines regulation of the Liver, support of the Kidney, and specific points of the Heart meridian.
Frequently asked questions
How many sessions before an effect is felt?
It varies from one person to the next, and no one can predict it in advance. What’s predictable, though, is the process: we agree on a plan at the first appointment, work through closely spaced sessions, then take stock together. If you feel no change by that review point, we adjust the strategy or revisit the assessment, rather than carrying on out of habit.
Is acupuncture compatible with my anxiolytics or antidepressants?
Yes. Acupuncture introduces no substance into the body, so there’s no known pharmacological interaction with psychiatric medications. Do mention all your treatments at the consultation, and remember: any change of medication is decided with your physician, never on your own initiative.
Is it covered by insurance?
Several private plans recognize acupuncture practised by a member of the Ordre des acupuncteurs du Québec. Coverage varies from one contract to another: you receive an official receipt after each session, and the best course is to check the terms with your insurer.
What if I don’t like needles?
Acupuncture needles are far finer than injection needles. The sensation of insertion is generally described as “a light pressure” or “nothing at all.” For people who are very reluctant, there are protocols using only auricular points or laser stimulation.
Going further: the five spirits
In Chinese medicine, stress and anxiety are read through the visceral spirits (wu shen), distributed among five organs. Our five-part series explores them one by one:
- Shen, the Spirit of the Heart
- Yi, the Spirit of the Spleen
- Po, the Corporeal Soul of the Lung
- Zhi, the Spirit of the Kidney
- Hun, the Spirit of the Liver
Booking an appointment
| Our team of acupuncturists in the heart of Plateau-Mont-Royal welcomes patients living with chronic anxiety every week. A first session is generally enough to tell whether the approach suits you. Would you like to know more about the approach first? See our Stress and anxiety page or contact us directly by email. |
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To explore further, see our approach to stress and anxiety.
Book your consultation online → monacupuncteur.janeapp.com
Sources
- Yang et al. (2021), Annals of General Psychiatry — meta-analysis of 20 trials, generalized anxiety disorder; SMD −0.41 (small to moderate), 18 of 20 trials conducted and published in China, comparators often without sham acupuncture.
- Bae et al. (2014), Evidence-Based Complementary and Alternative Medicine — meta-analysis, preoperative anxiety.
- Hamvas et al. (2023), Complementary Therapies in Medicine — parasympathetic tone and heart rate variability.
In the Plateau-Mont-Royal, open 7 days a week. Acupuncturists · OAQ members, physiotherapist · OPPQ member. Insurance receipts issued on site.Our content follows a published editorial methodology.