why does your nose bleed
Causes and Remedies. The chief cause of anterior nosebleeds is dry air. A dry climate or heated indoor air irritates and dries out nasal membranes, causing crusts that may itch and then bleed when scratched or picked. Common colds also can irritate the lining of the nose, with bleeding following repeated nose-blowing.
An injury or blow to the nose can cause bleeding, but most aren't a serious problem. But if your child has a facial injury that causes a bloody nose and you can't stop the bleeding after 10 minutes or have other concerns about the injury, get medical care right away.