When you see blood coming out of your nose, most people might panic because they think it's a sign of a serious condition. However, generally the cause of epistaxis or nosebleeds is not dangerous. Nosebleeds occur when blood comes out of the nose, can come from the front of the nose (anterior) or back of the nose (posterior), and blood can also come out of one or both nostrils. However, most epistaxis originates from the anterior and only comes out of one nostril. Causes of Epistaxis You Need to Know Anterior epistaxis is usually easy to treat, not a serious sign and can be treated at home. Meanwhile, posterior epistaxis (blood flowing into the oral cavity and throat) is more complicated and requires treatment from a doctor. This condition can occur at any age, but is more often experienced by children aged 2-10 years and adults aged 50-80 years. Bleeding that occurs can last for a few seconds to 10-15 minutes, or even longer. The following are some of the causes of anterio...