Electroacupuncture (EA) attenuated mechanical hyperalgesia induced by repeated intramuscular acid saline injection (fibromyalgia model, FM) as measured by von Frey filaments.

<p>(A) Mechanical responses of saline-injected control mice. (B) Mechanical responses of FM group mice. (C) Mechanical responses of FM mice pretreated with EA (FM + EA group). (D) Mechanical responses of FM mice pretreated by sham EA. Mice were tested before injection (baseline, B), 4 hours after injection, day 1 (D1), day 5 (D5), day 6 (D6), and day 8 (D8). Red arrowheads indicate acid injection; Blue dashes indicate EA. **<i>p</i> < 0.01 compared to baseline (n = 9 mice per group).