Pain is one of the most irritant complication of the post tonsillectomy . In
   this study the effect of injection of  2% lidocaine at the end of operation  for
   reduction of pain is evaluated .

          This is a clinical trial study . 60 children who were candidate for
   tonsillectomy were selected and randomly divided in to two groups .
   At the end of tonsillectomy 2% lidocaine  was injected in to the tonsillar pillar
   in 30 patients (study group) . Normal saline solution was injected in to the
   other 30 patients (control group) .

          According to the results pain has been decreased significantly in 80% of
   the study group. This study revealed the effectiveness of this procedure for
   decreasing of the post tonsillectomy pain and cause the patients to awake
   smoothly without irritability .