I am not a doctor but, do know a little about stokes and how they are caused.
Strokes are normally caused by the blocking of arteries to the brain ei.......High cholestol, fats, staurated fats, will cause a build up of plaque around the artery wall in hench making it harder for the blood to flow through and the heart has to pump harder to force that blood flow to the brain. Now take for instance the carodid artery in the neck. If that is over 50% blocked, it well could cause a major blockage to that side of the brain causing a left or right sided stroke.
I would say if you are concerned about your son's nose bleeds ( which I would be to) take him to the doctor and get down to the reason why this is happening. Don't start to worry about things that might not be. You will only stress yourslef out trying to figure out what is wrong with him. Could be absolutly nothing serious. You also may want to ask about having a blood test done that will tell his blood clotting time.
Does you son have allergies by any chance?

Carrie

Any one with any other ideas on this one?

i have highblood pressure, my nose bleeds for 3 hours and it was gushing. it stops and then it bleeds again the same thing but just for an hour for two days it was on and off but the longest was the first one that lasted 3 hours, that time ny bp was 180/100, i am in bp medication, blood sugar, cholesterol and with norvasc. this was the first time it happened to me. my doctor insisted that it was just dry nose, do i need further tests or check ups, now, with my same medication, my blood pressure is down till 112/77, but i am having a little dizziness(one that i can tolerate).

My hubband has high blood pressure...he is on meds for B/P. a feww weeks ago we were having sex and he had a nose bleed that sent him to the ER...a rhino rocket was placed in his nostril...which has since been removed. He has seen a nose, throat and ear specialist and explained what we were doing at the time of the bleed and the doctor said it was normal for that to have happened.My husband is still having problems with bleeds, some light headness and has had a few headaches.We are not sure why this has happened...my husband is also under doctors care for his high B/P. His mom died with a stroke...this is my concern