Acupuncture Improves Blood Pressure and Autonomic Health

A specific combination of acupuncture points targeting the wrist and ear led to a significant 12 mmHg drop in systolic blood pressure and improved measures of nervous system balance in a new clinical trial. The study, led by researchers Kadek Buja Harditya, Anak Agung Istri Mas Padmiswari, and Ida Ayu Suptika Strisanti, provides evidence that a multimodal acupuncture approach can effectively modulate autonomic function, which is often dysregulated in conditions like hypertension, tinnitus, and hyperacusis.

How Acupuncture Targets the Autonomic Nervous System

The autonomic nervous system controls involuntary bodily functions like heart rate, digestion, and blood pressure. It has two main branches: the sympathetic (“fight or flight”) and parasympathetic (“rest and digest”). An imbalance, with excessive sympathetic activity and reduced parasympathetic tone, is a known contributor to hypertension. This same imbalance is frequently implicated in the stress and heightened physiological arousal experienced by individuals with tinnitus, hyperacusis, and misophonia.

Acupuncture is thought to modulate this system. The research team hypothesized that combining a well-established somatic point, Neiguan (PC6) on the wrist, with specific auricular (ear) points could produce a stronger effect on autonomic regulation than either approach alone.

Study Design: Testing Four Acupuncture Protocols

The researchers conducted a randomized controlled trial with 60 adults aged 20–60. Participants were allocated into one of four groups for eight sessions over four weeks:

• Combination Therapy: Received needling at Neiguan (PC6), plus the auricular vagus nerve point and Er Shen Men on the ear.
• PC6 Only: Received needling only at the Neiguan (PC6) point.
• Auricular Only: Received needling only at the auricular vagus and Er Shen Men points.
• Sham Acupuncture: Received non-penetrating stimulation at non-acupuncture points.

Outcomes were measured objectively. Heart rate variability (HRV) metrics—SDNN, RMSSD, and the LF/HF ratio—quantified autonomic balance. Lower heart rate and a lower LF/HF ratio indicate increased parasympathetic activity. Blood pressure was also recorded before and after the intervention period.

Combination Therapy Shows Superior Results

The data revealed clear differences between the groups. The combination therapy group demonstrated the most substantial improvements across all measured parameters.

Their heart rate variability increased significantly, showing better overall autonomic modulation (SDNN) and a marked shift toward parasympathetic dominance (higher RMSSD, lower LF/HF ratio). Resting heart rate decreased. Most strikingly, systolic blood pressure fell by an average of 12.0 mmHg, and diastolic pressure by 10.0 mmHg.

The single-intervention groups—PC6 only and auricular only—showed moderate, positive changes. The sham acupuncture group, however, showed minimal to no change in any measure. Statistical analysis confirmed that the improvements in the combination group were significantly greater than those in all other groups.

This graded response—strongest for combination, moderate for single, absent for sham—supports the biological effect of the specific acupuncture points used. You can read the full study for details via its DOI.

Implications for Hearing and Sound Sensitivity Disorders

While this study directly measured blood pressure and HRV, its implications extend to auditory health. The autonomic nervous system is a common physiological link. Chronic stress and sympathetic overdrive can exacerbate tinnitus perception and sound sensitivity conditions like hyperacusis and misophonia.

An intervention that reliably increases parasympathetic calming activity and reduces cardiovascular stress could be a valuable component of a holistic management plan. This approach aligns with other body-mind interventions, such as the generative music therapy discussed on this site, which also aims to regulate the nervous system’s response to sound.

Furthermore, the success of a combined somatic and auricular protocol is noteworthy. The ear, or auricle, is a microsystem representing the entire body, and auricular acupuncture is a recognized tool in traditional medicine approaches for hearing disorders. This study provides a modern, evidence-based rationale for integrating ear points with body points for systemic effect.

A Practical, Non-Pharmacological Option

The research by Harditya and colleagues offers a concrete protocol with measurable outcomes. For patients and clinicians interested in non-pharmacological strategies for hypertension or stress-related components of auditory disorders, this multimodal acupuncture approach presents a viable option.

It underscores the importance of specific point selection and suggests that combining pathways—like the pericardium meridian via PC6 and the vagus nerve via the ear—may produce a more robust effect. As with any intervention, individuals should seek treatment from a qualified and licensed acupuncturist who can assess their individual health profile.

This study adds to a growing body of work exploring how modulating central and autonomic nervous system function can benefit both cardiovascular and auditory health, connecting disciplines often viewed separately in conventional medicine.