One study of migraine headache patients found that the majority of those who received "sham acupuncture" enjoyed relief. The patients' pain relief is most likely attributable to

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The study found that the patients received "sham acupuncture," which means that they did not receive actual acupuncture treatment. Therefore, any pain relief they experienced is likely due to the placebo effect, which is a psychological response in which a person feels better because they believe they have received an effective treatment, even though the treatment itself may be inert.

One Study of Migraine Headache Patients Found That the Majority