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Henry McGrath Dip.Ac Dip.TCM ND MTh

Bristol based – Worldwide web consultations
Acupuncture – Chinese Herbal Medicine – Naturopathy

How does acupuncture actually work?

25th March 2016

Self introduction

Acupuncture is the insertion of tiny needles into certain points on the body, for the treatment of illness.  It has been practised for over 2000 years in China, and is becoming ever more popular in the West.  It is estimated that over one million treatments are given per year in the UK.

There is increasingly good evidence that acupuncture can treat a wide range of conditions successfully.  The World Health Organisation website lists 28 conditions for which acupuncture has been “proved through controlled trials to be an effective treatment”, including rhinitis, headache, high blood pressure, lowered immunity, rheumatoid arthritis, sciatica, back pain, and knee pain.  It lists another 60 conditions for which some “therapeutic effect has been shown”, including asthma, infertility, insomnia, and pre -menstrual syndrome.

Thousands of western doctors and physiotherapists have undergone some training in acupuncture.  Despite this, many people are still sceptical about acupuncture because it seems to make no sense that the insertion of tiny needles can treat disease.  So how does acupuncture actually work?

Part of the answer is that the insertion of acupuncture needles causes the release of chemicals called “endorphins”.  (This word is short for “endogenous morphine”.  Endogenous means it is produced inside the body, and the word morphine actually comes from the Greek God of sleep, Morpheus!)  There are many kinds of endorphins in the human body, each with a different function.  Some reduce pain, some promote the healing of damaged tissue, some promote good sleep, some calm anxiety, and some play a role in hormone production.  So, we can see how acupuncture can be used to treat many conditions.

Recent scientific investigations have given us more clues.  Using an MRI scanner, it has been shown that the shallow insertion of needles at specific points causes increased activity in the pain control centres of the brain.  However, what the neuroscientists found really interesting and surprising was that if the needles are inserted deeper into the skin, and manipulated until the patient feels a tingling around the needle, the pain control areas become less active (you can see this remarkable experiment on You Tube).  This would explain why experienced practitioners get better results than novices, as getting the tingling sensation is an acquired skill.  One study showed that acupuncture caused changes in the brain which promoted to stroke recovery.  In this experiment, normal acupuncture was compared to “sham” acupuncture, where needles are deliberately inserted in the wrong points.  Only the correct acupuncture had the desired effect.

According to Chinese medicine, energy, or “qi”, gathers in certain points near the surface of the body, and flows along channels called “meridians”.  It has been speculated that this “qi” is a very low level of electrical impulse, and indeed acupuncture points and channels have been found to be areas of low electrical resistance.  When a person is ill, the electrical activity at the acupuncture points changes from what it normally is.  The insertion of needles helps to return the electrical activity of the acupuncture point to its normal level.  Experiments have been done where substances have been injected into acupuncture points, and been observed to move along the acupuncture channels.

So, there is mounting evidence that acupuncture has real health benefits, and that it has a scientific basis of action.

Henry McGrath