A nosebleed or epistaxis as it is medically known, are very common and is one of the most common causes of bleeding.
The nose contains many blood vessels. The vessels are often small and fragile and can burst easily which causes the nose to bleed through the nostrils or down the back of the throat.
There are two types of nosebleeds:
ANTERIOR nosebleeds are from a burst vessel in the front of the nose. This type of nosebleed is the most common.
POSTERIOR nosebleeds are less common and can be a bleed from an artery or blood vessel at the rear of the nose.