Effects of acupuncture on mental health of migraine patients: a systematic review and meta-analysis

Migraine is a complex neurological condition that affects approximately 1.3 billion people worldwide and is three to four times more common in women than in men. Recognized as the second leading specific cause of disability worldwide, migraine goes far beyond the intense headaches that characterize its attacks. This condition is frequently accompanied by mood disorders, such as anxiety and depression, especially in patients with chronic migraine. This relationship between physical pain and emotional suffering creates a damaging cycle that can significantly compromise patients' quality of life.

Although there are conventional medications for the treatment of migraine, such as anti-inflammatory drugs and other specific agents, many have significant side effects and do not always adequately address the emotional aspects of the condition. In this context, acupuncture has gained increasing recognition as a promising complementary therapy and is even recommended by the most recent Western medicine clinical guidelines for migraine prevention and treatment.

This study aimed to investigate the effects of acupuncture specifically on the mental health of migraine patients, analyzing both pain control and associated mood disorders. To this end, the researchers conducted a systematic review and meta-analysis, which is a type of study that combines and statistically analyzes the results of multiple previous studies on the same topic. The methodology followed rigorous international standards, including a search across six major scientific databases through January 2022. The researchers specifically sought randomized controlled clinical trials, which are considered the gold standard in medical research, comparing acupuncture with sham acupuncture or conventional medications.

Inclusion criteria were strict, requiring a clear diagnosis of migraine according to internationally recognized criteria and the use of validated instruments to measure anxiety, depression, pain, and quality of life. Studies combining acupuncture with other therapies were excluded, ensuring that the results reflected specifically the effects of acupuncture.

The final analysis included 13 randomized controlled clinical trials involving 1,766 migraine patients. Of these participants, 884 received true acupuncture, 296 were treated with conventional medications, and 606 received sham acupuncture. The results revealed statistically significant benefits of acupuncture in multiple aspects of patients' mental and physical health. For anxiety, measured by the Zung Self-Rating Anxiety Scale, acupuncture demonstrated superiority compared with the pooled control treatments, with a mean reduction of 5.64 points on the scale.

Similar results were observed for depression, with a mean reduction of 4.65 points on the Zung Self-Rating Depression Scale. As for general mental health, assessed using the Short Form 36 questionnaire, acupuncture showed significant improvement compared with control groups. Beyond the emotional benefits, acupuncture also demonstrated superior efficacy in pain control, measured by the Visual Analog Scale, and in migraine-specific quality of life. The reported adverse effects were minimal and generally limited to mild local discomfort and bruising at the application site, symptoms that disappear naturally after treatment.

These findings have important implications for both patients and health professionals. For patients suffering from migraine, especially those who also face anxiety and depression, acupuncture appears as a safe and effective therapeutic option that can complement or, in some cases, even replace medications with more significant side effects. Acupuncture offers a more holistic approach, simultaneously treating the physical pain and the emotional aspects of the condition, something that medications alone do not always adequately achieve. For health professionals, these results provide robust scientific evidence to recommend acupuncture as part of an integrated treatment plan for migraine.

Therapy can be particularly valuable for patients who do not respond well to conventional medications, who experience unwanted side effects, or who prefer more natural approaches. In addition, considering that acupuncture demonstrated efficacy both in prevention and in the treatment of acute attacks, it can contribute to reducing dependence on rescue medications and potentially decreasing long-term treatment costs.

Despite the promising results, the study has some important limitations that should be considered when interpreting the results. The significant heterogeneity found among the analyzed studies represents an important challenge. This variability may be related to differences in the selection of acupuncture points, techniques used by acupuncturists, treatment duration, and patient follow-up time. Some studies followed patients for only a few weeks, while others maintained follow-up for up to six months, making it difficult to determine the durability of the observed benefits.

Another limiting aspect is the inherent difficulty of creating fully blinded studies in acupuncture research, since patients can usually distinguish between real and sham acupuncture. This may introduce biases related to patients' expectations about treatment. Additionally, the relatively small number of studies included in the analysis limits the ability to detect more subtle differences between treatments and to adequately assess the safety of the therapy. The researchers acknowledge that future studies with larger samples, more standardized methodology, and long-term follow-up are needed to confirm and expand these findings.

Even considering these limitations, the results provide encouraging evidence that acupuncture can be a valuable tool in the comprehensive management of migraine, offering hope for millions of people who suffer not only from physical pain but also from the significant emotional impact of this debilitating condition.