Ob/ob mice develop mechanical allodynia. Mechanical thresholds were tested using von Frey monofilaments at 8, 9, 10, and 11 weeks of age. Ob/ob mice did not display significant differences from nondiabetic controls at 8, 9, or 10 weeks. However, at week 11, ob/ob mice had a significant decrease in their mechanical withdrawal thresholds. * = p < 0.05. n = 6 nondiabetic mice, n = 6 ob/ob diabetic mice.