Guarding pain behavior in rats treated with capsaicin or vehicle infiltration. Cumulative pain score in vehicle (n=8) treated rats (A) or rats treated with 0.025% (50μg/200μl, n=8) capsaicin (B) and in vehicle (n=8) treated rats (C) and after infiltration with 0.10% (200μg/200μl, n=8) of capsaicin (D). The results are expressed as median (horizontal line) with 1st and 3rd quartiles (boxes), and 10th and 90th percentiles (vertical lines). Pre is before injection, 0 is 1 day after injection and before incision. hr=hours, POD=postoperative day. *P<0.05 vs vehicle.