yes to what wild woman said.
Also - use saline gel spray in his nose - it will keep it moist and then will not be as prone to bleeding.
You should also talk to the Dr about flonase. They are doing some research that flonase (or the generic equivalent) is actually BETTER than the allergy pill, because it actually stops then nose from secreting the mucous when it has the allergic response.
Problem - it's gross. especially for kids. The saline spray won't have odor or taste - so usually better for kids.