Are Dangerous nose bleeds while rare originate in the back artery of and are complicated to treat?

Posterior epistaxis

* __Origin:__ Branches of the maxillary artery (sphenopalatine, descending palatine, and greater palatine arteries)

* __Bleeding:_ Profuse, life-threatening

* __Signs:_ Active bleeding from the posterior choana or blood in the nasopharynx

* __Treatment:__

- __First line:__ Anterior and posterior nasal packing

- __Second line:__

* Endoscopic therapy (eg, electrocautery, laser)

* Transantral ligation of the maxillary artery

* Intra-arterial embolization