Here's How Acupuncture Works In Relieving Pain

Acupuncture is a traditional Chinese medicine, which by twisting slowly or rotating the needle with gentle force or by heat can help in relieving pain.

Acupuncture has been in use for centuries to treat pain. The use of acupuncture dates back to the earliest recorded history in China. Despite being used for centuries, it is still unclear how and why this method of applying and stimulating tiny needles at certain points on the body can relieve pain. //

Recent studies have raised additional questions, with some finding acupuncture reduced chronic pain while others showed that acupuncture has little, if any, impact on pain.

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‘With the proper use of acupuncture and the use of heat, nitric oxide is released from the human skin, which increases blood flow and the release of analgesic or sensitizing substances.’

A new study from LA BioMed researchers offers some answers for why acupuncture may help and why clinical trials have produced mixed results.

The researchers found the proper use of acupuncture (with the reinforcement method or coupled with heat, which is often used in acupuncture treatments) can lead to elevated levels of nitric oxide in the skin at the "acupoints" where the needles were inserted and manipulated. They noted that nitric oxide increases blood flow and encourages the release of analgesic or sensitizing substances, which causes the skin to feel warmer and contributes to the beneficial effects of the therapies.

"Our lab has developed a painless, non-invasive biocapture device that can sample human biomolecules over specific skin regions," said Sheng-Xing Ma, MD, PhD, an LA BioMed lead researcher and corresponding author of the study published in Evidence-based Complementary and Alternative Medicine, Volume 2017.

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"With this tool, we were able to obtain the first evidence that nitric oxide is released from the human skin surface at a higher level with the proper acupuncture methodology and the use of heat."

Dr. Ma said several acupuncture clinical trials by conventional researchers have produced negative results, finding little difference in pain relief between the use of acupuncture and "sham acupuncture," in which needles are manufactured and/or inserted unsystematically. He said these studies have puzzled the acupuncture community and led many to question whether the proper acupuncture methodologies were used.

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For the latest study, the LA BioMed researchers used a low force and rate/reinforcement method of acupuncture. They gently inserted acupuncture needles into the skin of 25 men and women, aged 18-60 years, and delicately twisted the needles for two minutes or until they achieved a sensation of "de qi" (soreness, numbness, distension or pain). They then manipulated the needles using gentle amplitude and moderate speed for two minutes every five minutes for a total of 20 minutes.

They also applied electrical heat for 20 minutes and found elevated levels of nitric oxide at the acupoints. To further validate their findings, they conducted the test with high-frequency and force, which is known as a reduction method, and found nitric oxide levels over the areas of the skin region were reduced.

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Dr. Ma said his team will continue to explore the differences in these two acupuncture techniques to determine the effectiveness of each in pain relief and better understand the cellular and molecular mechanisms involved.

"Based on traditional Chinese medicine, acupuncture reinforcement is attained by slowly twisting or rotating the needle with gentle force or by heat," Dr. Ma said. "Reduction is attained by rapidly twisting or rotating the needle with great force. Reinforcement results in local feeling of warmness, but reduction causes a local feeling of coldness."

Source-Eurekalert