From the time I was born until after puberty I suffered from severe nosebleeds. Me and my brother both had the problem. I ended up in the ER several times having my nose cauterized, them wondering what's up with this kid with the nosebleeds. They thought maybe I was a hemopheliac, but I wasn't. Turned out that my brother and I both have very very fine blood vessels in our noses that made something as ordinary as, say, sitting in math class a catastrophic event. It's so embarassing to be a kid who has to run out of class holding a bloody kleenex when three seconds before you were cheerily answering, "46!"