This study aimed to investigate the effect of percutaneous injection of bupivacaine and dexamethasone on pain relief after pediatric tonsillectomy. This clinical trial study was performed on 68 children undergoing tonsillectomy surgery. The intervention group was given topical dexamethasone and topical bupivacaine to reduce postoperative pain but oral paracetamol was administered at a dose of 15 mg/kg when pain score was > 4 in the control group patient. Postoperative pain was recorded by VAS score at 6, 12 and 24 hrs. In the experiment 51.5% of the subjects were male and 48.5% were female and mean age was 7.5 ± 2.99 years. Mean pain at 6 and 12 hrs after surgery was not significantly different between the intervention and control groups, but at 24 hrs after surgery the mean pain in the intervention group was 1.85 ± 0.85 and in the control group was 2.38 ± 1.18 which was statistically significant. There was no significant correlation between mean age, sex, weight, and duration of surgery with mean pain scores in the intervention group and control group at 6, 12 and 24 hrs after surgery.