How do you stop a nosebleed quickly in a stall in a school bathroom during a four minute passing period?

Nosebleeds at school. You should see the school nurse or medical unit to help you stop the nosebleed. If you can see your doctor about finding the cause of your nosebleeds and finding out how to treat them.
Try this. Hold your nose tight below the nasal bone on the cartilage 7-10 min without looking. This will always stop it. $ minutes may not be enough.