3、 Artery ligation anterior ethmoid arter posterior ethmoid artery internal maxillary artery external carotid artery 4, Angiography and embolization submucous resection endoscopic cautery and ligation3、Artery ligation anterior ethmoid artery posterior ethmoid artery internal maxillary artery external carotid artery 4、 Angiography and embolization submucous resection endoscopic cautery and ligation