What Is Acupuncture? How It Works, Uses and What Research Shows

Acupuncture is a practice from traditional Chinese medicine in which a trained practitioner inserts very thin, sterile needles at chosen points on the skin, usually leaving them in place during a short rest. People explore it most often for long-lasting pain, frequent headaches and stress, alongside their usual care. This guide explains what acupuncture involves, where it comes from, what the research shows and who should check first.

What acupuncture is and how it works

In a typical session you lie on a padded table while the practitioner places fine, solid, single-use needles at points on areas such as the back, arms, legs, hands, feet or ears. They usually stay in during a period of rest, and the practitioner may turn them gently by hand. In electroacupuncture, a mild electrical current passes between pairs of needles, and some practitioners work only on the ear, a style known as auricular acupuncture.

Traditional Chinese medicine explains acupuncture through qi, a vital energy said to flow along channels called meridians, with points chosen to restore balance. This is a traditional framework: neither qi nor meridians have been identified by anatomy or physiology. Practitioners in this tradition often look at the tongue and feel the pulse to choose points, but a 2019 trial found that 38 acupuncturists assessing the same cases agreed with one another only weakly.

Researchers have proposed physical explanations. A 2008 review in Progress in Neurobiology, drawing largely on animal studies, described how needling activates nerve fibers and sends signals to brain areas that regulate pain, with the body's own opioid chemicals playing a central role. This helps explain why needling may affect pain, but how much it accounts for results in people is still debated.

Where acupuncture comes from

Acupuncture developed in China as part of a wider medical system that also includes herbal medicine, massage and moxibustion. Its theory was set out in classical texts, most famously the Huangdi Neijing, or Yellow Emperor's Inner Classic, compiled roughly 2,000 years ago. Claims that it is far older are hard to confirm.

Over the centuries acupuncture spread across East Asia, and distinct Japanese, Korean and Vietnamese styles developed. Interest in the United States grew in the early 1970s, after the journalist James Reston described in The New York Times how acupuncture was used to ease his discomfort after surgery in China. Today it is practiced worldwide by licensed acupuncturists and, in some places, by physicians and physical therapists. Dry needling uses similar needles but draws on Western anatomy rather than traditional theory.

What people use acupuncture for

People most often try acupuncture for long-lasting pain, such as chronic pain in the back, neck or shoulders, or knee pain from osteoarthritis, and for frequent headaches, including migraine and tension headaches. Others explore it for stress, sleep problems, digestive discomfort, menstrual pain or nausea, or simply for a regular hour of rest.

Many people turn to acupuncture when other options have not helped enough, or when they would like to rely less on medicines. That is reasonable, as long as it sits alongside medical assessment rather than replacing it. Practitioners also offer it for general wellbeing; those broader uses rest mostly on tradition and practitioner experience rather than trials.

These are reasons people explore acupuncture, not promises of a result, and research supports some uses far more than others. Gyfts covers two in more depth: acupuncture for chronic pain and acupuncture for anxiety. If you are weighing options, the acupuncture or massage comparison may help.

What the research says

Acupuncture is supported by substantial research for some chronic pain and headache conditions, but the effects are modest and evidence for other uses is thin. The largest analysis, a 2018 update in The Journal of Pain, pooled data from 20,827 people in 39 trials of back and neck pain, osteoarthritis, chronic headache and shoulder pain. Acupuncture beat both sham and no acupuncture for each, and the benefit fell only about 15 percent after a year.

Size matters. Compared with no acupuncture, the difference was moderate; compared with sham needling, it was small. Much of the benefit seems to come from the wider experience of treatment, but not all.

Cochrane reviews in 2016 found a similar pattern for headache. For episodic migraine (22 trials, 4,985 people), acupuncture reduced headache frequency compared with no preventive treatment, with a small effect over sham, and may be at least as effective as preventive drugs. For tension-type headache (12 trials), it helped more people than routine care, with a smaller margin over sham.

Not every guideline agrees: England's NICE guidance, issued in 2016 and still current, advises against offering acupuncture for low back pain and sciatica. For stress, sleep and most other uses, evidence of comparable size is lacking.

Safety and who should check first

Acupuncture is generally low risk with a trained practitioner using sterile, single-use needles, but it is not risk free. In a German study of 229,230 people treated by physicians, 8.6 percent reported at least one side effect, most often minor bleeding or bruising, followed by pain. Two people had a collapsed lung, or pneumothorax, a rare but serious complication of needling over the chest. A 2011 review found 95 serious cases reported since 2000, including five deaths, mostly collapsed lung and infection.

Talk with your doctor first if you have a bleeding disorder or take blood thinners, are pregnant (some points are traditionally avoided), have a pacemaker or other implanted device, have a weakened immune system, or have infected or broken skin where needles would go. New or severe symptoms need medical assessment.

Fitting it alongside everyday and conventional care

Acupuncture works best as one part of a wider plan. For chronic pain, that plan often includes staying active, exercise or physical therapy, and medicines your clinicians recommend, and acupuncture can sit alongside these. Keep taking prescribed treatments, and tell both your doctor and your acupuncturist what the other is doing.

Keep expectations grounded. Trials usually test a course of several sessions, and the average benefit is moderate rather than dramatic. Agree on a short trial period and a simple way to judge progress, such as pain scores or headache days, and stop if nothing changes. If you dislike needles, acupressure uses finger pressure on the same points.

Finding an acupuncture practitioner

Look for a licensed acupuncturist, or a clinician with recognized acupuncture training, who uses sterile single-use needles, explains each step and is honest about what the evidence shows. Licensing rules vary by state and country, so ask about training. Browse the Gyfts directory, read the acupuncture modality page, or explore related approaches. Cost varies, so ask about fees and insurance up front.

Related reading: dry needling vs acupuncture and how they differ compares the two techniques, their training and what the research shows.