Acupuncture has been used for thousands of years and research is starting to give us a clearer understanding of what happens in the body during treatment.
What patients describe in the treatment room, research is now measuring in the lab.
Pain Relief
Research shows that the fine needles appear to stimulate sensory nerves under the skin and muscle triggering the release of the body’s own natural painkillers (Han, Neuroscience Letters, 2004).
Brain imaging adds another layer to this. Pain isn’t just a sensory signal, there’s also an emotional layer, how threatening it feels, and that’s largely processed in the limbic system, the brain’s network for fear. Studies have found acupuncture reduces activity in these regions, including the amygdala, the brain’s alarm system (Hui et al., Human Brain Mapping, 2005).
Trials show a real effect on pain outcomes beyond placebo (Vickers et al., 2018), which matches what we witness in clinic.
Acupuncture Meridians
Traditional Chinese medicine maps the body along lines called meridians (channels that carry the body’s energy, Qi, connecting the surface of the body to internal organs), with acupuncture points sitting on those lines.
A 2002 study offered a physical explanation: researchers mapped points onto cross-sections of the arm and found around 80% lined up with connective tissue planes, the sheets of fascia running between and through muscles. Their theory: the meridian network may be tracing this connective tissue system (Langevin & Yandow, The Anatomical Record, 2002). Still a hypothesis, not proof, but a modern lens on a 2,000 year old map.
Understanding the Challenges of Acupuncture Research
The evidence for acupuncture is continuing to develop. Researching a physical treatment presents particular challenges: unlike a drug, it is difficult to create a completely inactive placebo (sham acupuncture in trials uses needles, but not at the acupuncture points being tested), and the acupuncture used in clinical studies does not always reflect what is provided in everyday practice.
For some conditions, there are also not enough large, high-quality studies to draw firm conclusions. These factors can make acupuncture’s effects harder to measure and may underestimate its benefits.
Despite these challenges, a growing body of high-quality research and systematic reviews supports acupuncture’s effects, particularly for pain. Rather than one single explanation, the research increasingly points to acupuncture influencing a network of processes involving the nervous system (more on that below), the brain, local tissues and the body’s own regulatory mechanisms.
How Acupuncture Talks To Your Nervous System
Acupuncture is often described as unblocking energy. A more useful explanation sits in the relationship between your central nervous system, the brain and spinal cord, and your peripheral nervous system, the nerve endings through muscle, fascia and connective tissue that constantly report on the state of your body.
A needle creates a small, precise stimulus at a peripheral nerve ending. That signal travels to the central nervous system, which reads it as information rather than injury and responds as it is programmed to.
That response is where the physiology happens. Locally, the stimulation triggers immune activity, a repair process your body already runs. Centrally, it can influence autonomic function, the systems governing inflammation, circulation and stress response. Research points to the release of the body’s own opioid peptides, endorphins and enkephalins among them, which help modulate pain (Han, 2004), and blood flow increases in the treated area, carrying oxygen and nutrients to the tissue (Kim et al., 2016).
It is a coordinated reply rather than a single mechanism, running from needle to brain and back in under a second. Nothing foreign is introduced beyond the needle, and the aim is homeostasis, your body’s ability to self-correct.
What Acupuncture Does In the Body
At Get Well Clinics we combine that evidence base with individualised care, because good treatment listens to your body, not just your diagnosis.
People come to us for pain and injury, fertility, digestive complaints, fatigue, anxiety & stress, recovery from illness, or because something has felt off for a while and they want an approach that treats the whole person.
Reduces Pain
Needling stimulates the nerves at the insertion point, prompting the release of natural pain relieving chemicals, endorphins among them (Han, 2004).
A meta-analysis of 39 randomised trials involving 20,827 patients found greater pain relief than sham acupuncture across several types of chronic pain (Vickers et al., 2018).
Many patients leave feeling looser straight away.
Calms the Nervous System
Needling prompts the nervous system to shift out of a stressed, alert state into a calmer one. A meta-analysis of 9 randomised trials found acupuncture affected heart-rate variability and parasympathetic activity, the measures tracking that shift (Hamvas et al., 2023).
Which is why so many patients describe a session as deeply relaxing.
Rest and Recovery
That same parasympathetic shift (Hamvas et al., 2023) plays into rest as well as relaxation.
As the body moves out of high alert, many patients feel drowsy or deeply calm by the end of a session.
Local Circulation
A systematic review found acupuncture increased local blood flow in muscle and skin, particularly in muscular pain conditions (Kim et al., 2016), bringing oxygen and nutrients where needed.
One of the more measurable effects, and part of why physios often recommend it alongside their own treatment.