TRPV1 and fibromyalgia: The low TRPV1 expression in normal mice significantly increased in the SCDH of fibromyalgia pain mice (Figure 3B, * p < 0.05, n = 6); this phenomenon was alleviated by 2 Hz EA treatment and was also observed in Trpv1−/− mice (Figure 3B, # p < 0.05, n = 6).