My son has then all the time. Certain seasons are worse, but he will wake up in the morning with his pillow all stained and dried blood all over his face....sounds horrible, but the worse thing is having to throw out a lot of pillows LOL!! As long as the nosebleeds stop with some pressure, it's probably not a big deal. The capillaries in the nose are so very close to the surface, so they can dry out easily, and if they get bumped, they break. Some kids just have more of them. I like the advice you've received regarding the foods with Vitamin K and yogurt. Other than that, he may just grow out of them. It certainly wouldn't hurt to bring it up at your son's next peds appointment - they can always do blood tests to make sure everything is ok. Most of the clotting disorders I'm aware of, there's a lot of blood and a lot of bleeding, that is very hard to get to stop. Sometimes the child had to go in to have the vessels cauterized. If you are able to stop the smaller anount of blood within a couple minutes, that's good. Good luck!!