Figure 1: Effects of electroacupuncture on flinching numbers. Bar graphs were divided into early (0–10 min) and late phases (10–60 min). Experimental groups: Formalin formalin injection only group; EA-For electroacupuncture treatment at BL60 before formalin injection; Sham-For acupuncture needle insertion at BL60 but no electric stimulation before formalin injection. In the early phase, there were no significant differences between the groups. However, flinching numbers of the EA-For group were significantly decreased in the late phase. Each bar represents the group mean ± SEM (* ).