Effectiveness of Manual Therapy and Acupuncture in Tension-Type Headache: A Systematic Review

Tension-type headache is one of the most common forms of headache, affecting a significant portion of the world population. Characterized by continuous pain, like a pressure or tightening around the head, generally described by patients as a "tight band" on the forehead, neck, and shoulders, this condition can cause considerable impact on people's quality of life. Although it is more frequent in adult women, it can affect people of any age. The exact mechanism that causes these headaches is not yet completely clear, but muscle tension, frequently related to stress and anxiety, is believed to play a fundamental role.

With an estimated prevalence of 36% to 78% among all headaches, and considering that approximately 90% of people have experienced some type of headache during their lives, it becomes evident the importance of finding effective and safe treatments for this condition.

This study had as its main objective to evaluate the effectiveness of two specific non-pharmacological approaches in the treatment of tension-type headache: acupuncture and manual therapy. To this end, the researchers conducted a systematic review, following rigorous criteria of scientific analysis. The search for studies was performed mainly in the PubMed database, considering research published between 2011 and 2021, in English, involving only adults aged 19 years or older. Different types of studies were included, such as randomized clinical trials, observational studies, and systematic reviews.

After applying specific inclusion and exclusion criteria, the researchers selected eight articles that involved a total of 3,846 participants. The quality of the studies was evaluated by two independent researchers, using internationally recognized scales to ensure the reliability of the results.

The results demonstrated promising evidence for both treatments evaluated. Regarding acupuncture, the studies showed that patients who received true acupuncture presented a 50% reduction in headache frequency, compared with 43% reduction in the group that received simulated acupuncture or only usual care. In addition to the decrease in frequency, significant improvement was observed in quality of life, functional capacity, and general state of health of patients treated with acupuncture. Interestingly, although acupuncture proved to be effective, it did not demonstrate superiority over physical therapy, exercise, or massage therapy.

Regarding manual therapy, which includes techniques such as massage, cervical spine manipulation, and mobilization, the results were equally encouraging. Studies conducted in different countries showed a statistically significant decrease in headache intensity, with some patients showing up to 24% reduction in pain intensity 24 hours after treatment with massage. The effectiveness of manual therapy proved to be comparable to preventive medications and tricyclic antidepressants traditionally used in the treatment of tension-type headache.

For patients suffering from tension-type headache, these results represent a valuable perspective of relief through natural and less invasive approaches. Acupuncture, an ancient practice of Chinese medicine, offers a safe alternative with few side effects compared with conventional medications. The most common adverse effects include small bruises, localized pain, and swelling at needle insertion sites, but these symptoms are temporary and self-limited. For health professionals, these findings suggest that both acupuncture and manual therapy may be incorporated as complementary or alternative treatment options, especially for patients who prefer to avoid medications or who do not respond adequately to conventional treatments.

Manual therapy, in particular, has been shown to be widely used and accessible, being reported as effective by 17% to 82% of patients in different studies, with an average of 42.5% improvement. It is important to highlight that the combination of different approaches, such as acupuncture associated with postural exercises and physical therapy, demonstrated even more significant results in reducing the frequency and intensity of pain.

Despite the promising results, the study presents some important limitations that should be considered in the interpretation of the findings. One of the main difficulties faced by the researchers was the standardization of treatments, since both acupuncture and manual therapy can vary significantly in terms of techniques applied, points treated, and duration of treatments. In addition, the conduct of double-blind studies (where neither the patient nor the therapist knows which treatment is being applied) is practically impossible in these therapeutic modalities, which can influence the results. The lack of standardized protocols also makes direct comparison between different studies difficult.

The researchers also acknowledge that data on long-term benefits are limited, and that more research is needed to establish the optimal duration of treatments and the maintenance of benefits over time. Despite these limitations, the available evidence strongly suggests that both acupuncture and manual therapy represent valuable options in the therapeutic arsenal for the treatment of tension-type headache, offering patients safe and effective alternatives that can significantly improve their quality of life and reduce dependence on medications.