A variety of reasons can lead to bleeding from the nose. However, a hard object that hits the nose is found to be the most common cause of bleeding from the nose. Any indirect physical trauma such as hemorrhages or severe migraines can also lead to the rupture of a tiny blood vessel within the nasal passage and cause bleeding.
Certain medications, allergies, colds and high altitudes are yet other reasons. Upper septum nosebleeds and lower septum nosebleeds are the two common types of bleeding that occur from the nose. While, lower septum bleeding is generally not so serious and can be stopped within half an hour, upper septum bleeding demands medical attention. But, bleeding due to upper septum damage is found to be rare.
In case of upper septum nose bleeding, the damage has most probably occurred somewhere high within the nose. Here the downward flow of the blood stream is from back of the mouth and throat. There is no difference in the strength of the flow even as the person is sitting up or standing. These nosebleeds can turn out to be extremely fatal, if urgent medical attention is not provided.
Some of the major causes of upper septum nosebleed include high blood pressure, disorders in the functioning of the arteries due to diseases such as arteriosclerosis, both cancerous and non-cancerous tumors that affect the nasal passage, serious trauma such as a broken nose, leukemia etc. Bleeding from the upper part of the nose can also be the aftereffect of some medication. However, in some people nasal bleeding might be triggered for no obvious reason.
However, the first aid to be given to a patient suffering from upper end nose bleeding is same as that of bleeding from lower end nose. Your doctor might pack the nose with inflatable latex balloon in order to stop the bleeding.