• Jin Kuk Do and Dong Rak Kwon.
• Department of Neurology, Catholic University of Daegu School of Medicine, Daegu, South Korea.
• Int. J. Clin. Pract. 2021 Sep 1; 75 (9): e14437.

ObjectiveTo investigate the therapeutic effect of cranial microcurrent stimulation (CMS) in patients with tension-type headaches (TTH).MethodsThis study was designed as a prospective, randomised, double-blinded and sham-controlled trial. A total of 22 patients with tension-type headache were selected as our study participants and randomly assigned into two groups: CMS group (n = 11) and Sham group (n = 11). To each of the participants, a sham or a true portable CMS stimulation device (CMS; intensity, 25 μA; frequency, 8 Hz) to wear was distributed, and 20-minute daily treatment was provided using the device for 2 weeks. In CMS group, treatment was given by means of electrodes clipped to the ear, whereas, in Sham group, sham treatment was provided by CMS without current. The measurements of Visual Analogue Scale (VAS), Headache Impact Test-6 (HIT6), Patient Health Questionnaire-9 (PHQ9), Generalised Anxiety Disorder 7-item (GAD7) and Hospital Anxiety and Depression Scale (HADS) were performed at pre-treatment (baseline), week 1 and 2 of treatment and two weeks post-treatment.ResultsIn CMS group, VAS of maximal headache and VAS of current headache, HIT6, PHQ9 and GAD7 significantly decreased by two weeks post-CMS therapy, but not in Sham group (P < .05). Scores of HADS-A (anxiety), HADS-D (depression) and HADS-T (total) significantly decreased by 2 weeks post-CMS therapy in CMS group, but not in Sham group (P < .05). Changes in scores of PHQ9 and GAD7, HADS-A, HADS-D and HADS-T in CMS group were significantly greater than in Sham group by 2 weeks post-CMS therapy (P < .05).ConclusionThe results indicate that CMS, as an adjunctive treatment for patients with TTH, is safe and analgesic as well as reducing depression or anxiety.© 2021 John Wiley & Sons Ltd.

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