My daughter had a colossal nosebleed today. A real gusher. It continued long enough to make me call her pediatrician's office, and a nurse told me to wait five or 10 minutes more and then take her to an urgent care center. By 10 minutes it was slowing down, and it finally stopped, with the help of an icepack to the nose.
Then, five hours or so later, just before bedtime, it started again. More gushing. So this time we did hop in the car and head to the Immedicenter, where a doctor cauterized a scraped-up area on her septum. No more nose-picking for you, young lady! If my admonishments to that effect couldn't stop her, perhaps that burning stick up her nose will.