Acupuncture works by inserting fine sterile needles into specific anatomical points, triggering a cascade of neurological, hormonal and immune responses. It activates C-fibre nerve pathways, stimulates natural endorphin and serotonin release, modulates cortisol levels, and reduces systemic inflammation — producing measurable physiological change that explains why it effectively treats pain, stress, fertility and digestive conditions.
What Happens at the Moment of Insertion
When Amanda inserts an acupuncture needle — typically 0.25–0.30mm in diameter, finer than a human hair — the first response occurs in your peripheral nervous system. The needle passes through skin and into the underlying soft tissue, where it encounters the fascial layer: the web of connective tissue that surrounds every muscle, organ and nerve.
Your sensory nerves detect the insertion through two pathways. First, A-delta fibres register the initial sharp sensation (brief, localised). Then, more slowly, unmyelinated C-fibres produce the deeper aching, heaviness or mild electric sensation known in Chinese medicine as de qi.
De qi is considered a positive therapeutic sign — it suggests the needle has reached an anatomically active location where the fascial and neural tissue are responding. But de qi varies considerably. In twenty-plus years of clinical practice, Amanda has observed that it fluctuates with constitution, hydration, time of day, and hormonal cycle phase. Patients who don't consciously feel de qi still respond to treatment; C-fibres carry the signal whether or not it reaches conscious awareness.
The Nervous System Cascade
From the insertion point, the signal travels along the peripheral nerve to the dorsal horn of the spinal cord — the first major processing station for sensory information before it ascends to the brain. This is where acupuncture's effect diverges most meaningfully from simple pressure or placebo.
C-fibre stimulation releases neuropeptides including substance P into the dorsal horn, activating the body's descending inhibitory control system — a network running from the periaqueductal grey in the brainstem down through the spinal cord that naturally suppresses pain signals. This is the physiological basis of acupuncture's analgesic effect. It operates independently of belief or expectation. Controlled trials using functional MRI confirm that acupuncture suppresses activity in the brain's pain matrix (anterior cingulate cortex, insula, thalamus) in ways that sham needling at non-acupuncture-points does not replicate.
The signal also travels via two distinct routes: a somatic route (voluntary nervous system, addressed in chronic pain conditions) and an autonomic route — directly relevant to stress, anxiety, sleep and fertility responses.
The Brain's Response — Hormones and Neurotransmitters
Above the spinal cord, acupuncture produces measurable changes in the brain. Harvard Medical School's Martinos Center for Biomedical Imaging has used fMRI and PET scanning to map these changes in real time.
Endorphins and natural opioid peptides: The brain releases beta-endorphins and enkephalins during acupuncture treatment. These are the molecules responsible for the characteristic post-treatment calm — the relaxed, slightly floaty quality that most patients notice. They also explain why acupuncture's pain relief outlasts the treatment session itself.
Serotonin and dopamine modulation: Acupuncture affects serotonin pathways in ways relevant to mood, sleep and appetite. Multiple clinical trials show it effective for mild-to-moderate depression and sleep disorders — effects mediated by neurotransmitter changes, not merely relaxation.
Cortisol regulation: One of the most clinically significant effects, particularly for patients seeking fertility and hormonal support. Acupuncture suppresses the HPA axis (hypothalamic-pituitary-adrenal) — the brain-to-adrenal feedback loop that controls cortisol output. Elevated cortisol directly suppresses reproductive hormone signalling (LH, FSH, oestrogen). Reducing it improves the hormonal environment for both cycle regularity and IVF outcomes.
Prostaglandin modulation: At the local tissue level, acupuncture reduces pro-inflammatory prostaglandins, producing measurable anti-inflammatory effects at the treated points and, through systemic signalling, in distant tissues.
The Fascial Network — Where Ancient Maps Meet Modern Anatomy
One of the more remarkable developments in acupuncture research is the discovery that acupuncture points and meridian pathways map onto the body's fascial network — the connective tissue web surrounding every muscle, nerve and organ.
Dr. Helene Langevin at Harvard Medical School demonstrated that when an acupuncture needle is rotated — a standard clinical technique — collagen fibres in the surrounding fascia wind around the needle shaft. This mechanical coupling between needle and tissue creates a local piezoelectric effect: a tiny electrical current generated by physical deformation of the collagen matrix. That current propagates along fascial planes in patterns that correspond closely to classical meridian pathways.
This finding bridges the gap between the traditional Chinese medicine model (Qi flowing through channels) and modern anatomy (electrical and chemical signalling through connective tissue). It doesn't confirm or deny the existence of Qi as a metaphysical concept. But it suggests the ancient practitioners were mapping something real — even if their explanatory framework was different from ours.
For acupuncture treatment in Cambridge, Amanda works with both frameworks: the biomedical model informs which tissue is being stimulated and what physiological response to expect; the Chinese medicine model guides where to needle, how to combine points, and how to read the pattern of symptoms connecting seemingly unrelated complaints.
The Traditional Chinese Medicine Perspective
Chinese medicine describes acupuncture through Qi — the body's vital energy flowing through meridian channels connecting organs, tissues and the body surface. When Qi flows freely, health is maintained; when it becomes stagnant, deficient or excessive, symptoms arise.
This framework is diagnostic as much as it is explanatory. Two patients presenting with "back pain" will likely receive different point combinations based on their Chinese medicine diagnosis — one might have Kidney Yang deficiency with Cold-Damp accumulation in the Bladder channel; another might have Liver Qi stagnation with Heat. The point selection differs because the pattern differs, even though the Western symptom is similar.
Amanda trained in both Chinese medicine theory and contemporary physiological research. She introduced Gua Sha to the UK teaching curriculum during her years teaching at the London College of Traditional Acupuncture (LCTA, 2004–2011). She finds neither explanation alone is sufficient — and she explains both to her patients during their first consultation.
What the Evidence Actually Shows
The evidence base for acupuncture is uneven — stronger for some conditions than others — and it matters to be honest about this.
NICE (National Institute for Health and Care Excellence) currently recommends acupuncture for:
- Chronic primary pain — including fibromyalgia, chronic widespread pain
- Chronic tension-type headache and migraine prevention — recommended as a 10-session course
- Chronic lower back pain — alongside physiotherapy and exercise
The Acupuncture Trialists' Collaboration, a large individual-patient-data meta-analysis from 39 trials (20,827 patients), found acupuncture significantly more effective than both sham acupuncture and no treatment for chronic pain — with effects persisting at 12-month follow-up. Durability beyond the treatment period argues against a simple relaxation or placebo mechanism.
Evidence is growing, though less definitive, for: fertility support (particularly alongside IVF), insomnia, menopausal symptoms, anxiety and depression. Amanda will tell you at your first consultation what the current evidence actually says about your specific condition — not what you might want to hear, but what the data supports.
Frequently Asked Questions
How long does acupuncture take to work?
This depends significantly on the condition. For acute musculoskeletal pain — a recent shoulder strain, a tension headache — many patients notice relief within one to three sessions. Chronic conditions that have built up over months or years take longer to shift: typically six to eight sessions over six to twelve weeks to establish a lasting change, followed by monthly maintenance once the condition has stabilised. Amanda discusses timelines honestly at the first consultation so patients can make an informed decision about committing to a course of treatment. There is no benefit in continuing if no response has occurred by session four or five — and Amanda will tell you if she believes another approach would serve you better.
Does acupuncture actually work, or is it all placebo?
The honest answer is: it's not purely placebo, but how much of its effect is "specific" to the needle location versus "non-specific" (therapeutic encounter, expectation, relaxation) is still debated. What the research clearly shows is that acupuncture outperforms no treatment for chronic pain, headache and several other conditions — exceeding what we'd expect from placebo alone. The Acupuncture Trialists' Collaboration meta-analysis — 20,827 patients from 39 high-quality trials — found acupuncture significantly more effective than sham at 12-month follow-up. Sham acupuncture (needling non-points) also outperforms no treatment, suggesting some non-specific effect. But acupuncture proper outperforms sham. That distinction matters.
What does acupuncture feel like?
Most people experience a brief sharp sensation as the needle passes through the skin — comparable to a mosquito bite — followed by a settling into one of several characteristic sensations: a dull ache, a feeling of heaviness, gentle warmth, or occasionally a mild electric tingle. These are the de qi sensations described in Chinese medicine. Not everyone feels them, and absence of de qi does not mean the treatment is ineffective. Once the needles are in place — usually between eight and twenty needles depending on the prescription — most patients relax deeply. Many fall asleep. The majority leave feeling calmer than they arrived, with a lightness that can last for one to two days.
How many acupuncture sessions do I need?
For acute conditions: three to six sessions is usually a complete course. For chronic conditions that have been present for months or years: a course of six to ten sessions over six to twelve weeks is typically required to establish a lasting shift. After an initial course, most patients move to monthly maintenance to protect the gains. Amanda reviews progress at every session and discusses the treatment plan openly. If you're not responding as expected after four sessions, she will say so and either adjust the approach or recommend a different practitioner or modality.
Is acupuncture safe?
Acupuncture practised by a qualified and registered acupuncturist is one of the safest medical interventions available. Amanda is a Member of the British Acupuncture Council (MBAcC) — the UK's largest professional body for acupuncturists, whose members adhere to strict codes of safe practice. She uses single-use, sterile, disposable needles exclusively. Serious adverse events from acupuncture are extremely rare (estimated at fewer than one per 10,000 treatments). The most common side effects are mild bruising at the needle site and occasional post-treatment tiredness — both resolve within 24–48 hours. Amanda takes a full health history at your first consultation, including medications and conditions, to identify any specific contraindications.
What conditions can acupuncture treat?
NICE recommends acupuncture for chronic primary pain (fibromyalgia, widespread pain), chronic headache and migraine prevention, and chronic lower back pain. Beyond these, acupuncture has a well-established clinical tradition in treating: fertility challenges and IVF support, menstrual irregularity and endometriosis symptoms, menopausal hot flushes and mood shifts, anxiety, sleep disorders, digestive complaints including IBS and bloating, and respiratory conditions. Amanda's particular areas of clinical experience include fertility, women's health, and musculoskeletal pain. A full list of conditions she treats is at amandaody.com/conditions.
About the Author
Amanda Ody (MBAcC, MRCHM) is a registered acupuncturist and Chinese herbalist with over 20 years of clinical experience in Cambridge and Saffron Walden. She taught Chinese medicine theory at the London College of Traditional Acupuncture from 2004 to 2011 and introduced Gua Sha into the UK acupuncture curriculum. She holds dual membership of the British Acupuncture Council (BAcC) and the Register of Chinese Herbal Medicine (RCHM).
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