Auricular Acupuncture: A Potential Treatment for Anxiety

Anxiety is a common experience that affects millions of people, especially in medical situations such as surgical procedures. Up to eighty percent of adult patients may experience intense anxiety levels before surgery, which can negatively affect their postoperative recovery. Currently, available treatments include sedative medications and psychological preparation programs, but both represent high costs for the healthcare system. Medications can have lasting side effects, while psychological programs are time-consuming and not always effective.

Faced with this scenario, researchers at Yale University investigated a promising and low-cost alternative: auricular acupuncture, a technique that applies stimuli to specific points on the ear.

This study was conducted as a randomized controlled clinical trial involving 55 healthy health professionals, aged between 27 and 64, who had never received acupuncture before. Participants were divided into three distinct groups to compare different auricular acupuncture points. The first group received acupuncture at the "Shenmen" point, considered a master point for relaxation in traditional Chinese medicine. The second group was treated at the specific "Relaxation" point, documented in French texts on auricular acupuncture.

The third group served as a control, receiving acupuncture at a "placebo" point that has no known anxiolytic properties. The treatment was applied to both ears using special pressure needles that remained in place for 48 hours. During this period, the researchers measured anxiety levels using scientifically validated questionnaires, in addition to monitoring physiological signs such as blood pressure, heart rate, and skin electrodermal activity.

The results revealed that auricular acupuncture can effectively reduce anxiety in healthy individuals. Specifically, participants who received treatment at the "Relaxation" point showed a significant reduction in anxiety levels compared with the other two groups. This improvement was observed as early as 30 minutes after needle application, was maintained for 24 hours, and was still detectable after 48 hours. Interestingly, the "Shenmen" point, traditionally considered important for relaxation, did not demonstrate as pronounced an effect as the specific Relaxation point.

Regarding the physiological parameters measured, there were no significant differences between the groups in blood pressure, heart rate, or electrodermal activity. The researchers explain that this was expected, since the healthy volunteers did not present elevated physiological stress levels at baseline, making it difficult to detect changes in these parameters.

For patients facing anxiety related to medical procedures, these results offer hope for a new therapeutic option. Auricular acupuncture has several practical advantages: it is technically simple to apply, requires less expertise than traditional body acupuncture, has a very low cost compared with sedative medications, and may be more acceptable to patients who prefer to avoid medication. The fact that the effect begins quickly, in only 30 minutes, makes this technique suitable for the hospital environment, where time is often limited. In addition, since the benefit can last up to 48 hours while the needles remain in place, there is the possibility that auricular acupuncture may also help control anxiety after surgical procedures.

For health professionals, this research suggests that auricular acupuncture can be a valuable complementary tool in managing patient anxiety, especially given its favorable safety profile and reduced cost.

It is important to recognize the limitations of this initial study. The research was conducted with healthy health professionals in their normal work environment, not with patients actually anxious before medical procedures. The authors themselves recognize that the anxiety experienced by healthy individuals in everyday life may differ from the intense preoperative anxiety that patients face. In addition, the relatively small size of each group and the unequal distribution of characteristics such as age and gender may have influenced the results.

Despite these limitations, the researchers consider the results to be promising enough to justify future studies with real surgical patients. Although we still do not fully understand how auricular acupuncture produces its anxiolytic effects, theories suggest that it may alter brain chemistry, possibly affecting neurotransmitters such as serotonin, which plays a fundamental role in mood and anxiety regulation. This study represents an important first step toward more accessible and natural treatments for anxiety in medical contexts.