Fig. 3

Daily microcurrent treatment reduces current sinus pain score over 4 weeks. Subjects with sinus pain self-administered microcurrent treatment at home once per day and up to four times per day as needed for 4 weeks. Numeric rating scale for pain was collected weekly. Compared to before treatment, mean current numeric rating scale for pain scores were significantly reduced at all time points measured (a). Mean difference in current pain score from before treatment peaked at − 2.9 (− 43.3%) numeric rating scale points at week four (b). Data represented as mean ± SEM. **p < 0.01, ****p < 0.0001, repeated measures one-way ANOVA with Dunnett correction for multiple comparisons