<P> Nosebleeds are due to the rupture of a blood vessel within the richly perfused nasal mucosa . Rupture may be spontaneous or initiated by trauma . Nosebleeds are reported in up to 60 % of the population with peak incidences in those under the age of ten and over the age of 50 and appear to occur in males more than females . An increase in blood pressure ( e.g. due to general hypertension ) tends to increase the duration of spontaneous epistaxis . Anticoagulant medication and disorders of blood clotting can promote and prolong bleeding . Spontaneous epistaxis is more common in the elderly as the nasal mucosa ( lining ) becomes dry and thin and blood pressure tends to be higher . The elderly are also more prone to prolonged nose bleeds as their blood vessels are less able to constrict and control the bleeding . </P>
<P> Nosebleeds are due to the rupture of a blood vessel within the richly perfused nasal mucosa . Rupture may be spontaneous or initiated by trauma . Nosebleeds are reported in up to 60 % of the population with peak incidences in those under the age of ten and over the age of 50 and appear to occur in males more than females . An increase in blood pressure ( e.g. due to general hypertension ) tends to increase the duration of spontaneous epistaxis . Anticoagulant medication and disorders of blood clotting can promote and prolong bleeding . Spontaneous epistaxis is more common in the elderly as the nasal mucosa ( lining ) becomes dry and thin and blood pressure tends to be higher . The elderly are also more prone to prolonged nose bleeds as their blood vessels are less able to constrict and control the bleeding . </P>
where does the blood from nose bleeds come from
where does the blood from nose bleeds come from
the rupture of a blood vessel within the richly perfused nasal mucosa
the rupture of a blood vessel within the richly perfused nasal mucosa