Nosebleed is a common clinical symptom, also known as nosebleed. There are many reasons, which can be roughly divided into local reasons and systematic reasons. The bleeding site usually occurs in the bleeding prone area below the anterior nasal septum. People over 40 years old are more common in the back of the inferior nasal meatus.

Nosebleeds have different manifestations due to different reasons, and the amount of bleeding varies, which can be intermittent bleeding or persistent bleeding. It can be seen that there is bleeding in the anterior nostril and someone flows into the pharynx from the posterior nostril. There are many causes of nosebleed, which can be roughly divided into two categories: systemic causes include blood diseases, hypertension and some acute infectious diseases, uremia and vitamin deficiency. Local factors are mostly seen in sinus trauma, nose and postoperative bleeding, nose digging, nose blowing, nasal septum deviation, sinusitis, nose, sinus and nasopharyngeal malignant tumors.