This study is a prospective and multi-centre trail in China. It intends to enroll 25000 patients underwent coblation tonsillectomy in 22 clinical centers in China. Hemorrhage rate and risk factors of hemorrhage after coblation tonsillectomy will be investigated through questionnaires.
To obtain hemorrhage rate after coblation tonsillectomy, and to investigate risk factors of hemorrhage after coblation tonsillectomy in children.