Most nosebleeds happen because of dry air or because of nose-picking. They can occur during a common cold or an allergy attack. Most aren't serious but sometimes you need to see a health care provider.
A nosebleed is bleeding from tissues inside the nose (nasal mucus membranes) caused by a broken blood vessel. Most nosebleeds in children occur in the front part of the nose close to the nostrils.
Nosebleeds are common in children. They usually aren't a sign of a serious problem. You can treat most nosebleeds at home. And you can take steps to help your child prevent them.