Hi and thanks for the query,
Generally, the commonest cause of nose bleeding caused epistaxis is idiopathic, meaning of no known cause. High blood pressure
can cause hypertension
, but is usually accompanied by other signs and symptoms of hypertension.
Other causes of nose bleeding like chronic rhinitis
, clotting factor abnormalities and at times certain tumours are worth being excluded. It shall be interesting for you to get consulted by an ENT specialist
too, and the blood pressure well controlled.