This used to be me a lot. It can be due to a number of things. Dry nose, thin skin membrane within the nose, or perhaps allergies making the nose very sensitive. For some people, this is gets worst in the winter when the heater is always on and skin becomes more dry. It' easier for bleeding to happen when you sneeze, it's a rather aggressive action for your nose ontop of dry skin.
well everyones noses are sinsitive but some are REALLY sinsitive
i think its because their noses are sinsitive