Inclusion Criteria:  pediatric patients aged 6 months to 3 years who are planning to undergo hypospadias surgery American Society of Anesthesiologists (ASA) classification 1~2  Exclusion Criteria:  patients who are having uncorrected heart deformity patients who are having vertebrae deformity in which the pudendal nerve block cannot be performed patients with blood coagulopathy patients with diagnosed diabetes patients with diagnosed adrenal disease patients with fever above 37.5 degrees before surgery patients currently taking steroids patients contraindicated for dexamethasone administration