What causes our noses to bleed?
To better understand the causes of nasal bleeds, we have to understand that under normal conditions, arteries and veins of the body have an intact wall with a competent coagulation system that even if injury occurs to a blood vessel, coagulation will occur quickly enough to prevent any serious loss of blood. Therefore, causes of nasal bleeds include:
1) Trauma
Trauma is by far the most common cause of nasal bleeding, be it a punch during a fight, walking into a telephone pole or even vigorous nose picking. Here, the most common site of injury is the nasal septum or the nasal bridge. Unless the trauma is severe like in road traffic accidents, no serious blood loss occurs and bleeding stops within minutes. If the trauma was enough to break the nasal bone, then more serious bleeding can occur especially posterior bleeding.