Here’s what experts say about nosebleeds. What is a nosebleed? A nosebleed, known medically as epistaxis, comes in two forms: anterior and posterior. The most common cause of nosebleeds is the drying of the nasal membranes. If a person is prone to recurrent or frequent nosebleeds, it is often helpful to lubricate the nose with an ointment of some type. Although nosebleeds can appear dramatic, they are rarely life-threatening; most resolve without medical intervention, but posterior or severe bleeds may require urgent care. Over 99% of nosebleeds will stop if you press on the right spot. It may take 10 minutes of direct pressure. After swallowing blood from a nosebleed, your child may vomit a little blood. Your child may also pass a dark stool tomorrow from swallowed blood. Call Your Doctor If: Can't stop bleeding with 10 minutes of direct pressure done correctly Nosebleeds usually aren’t serious, but knowing how to stop the bleeding and treat your symptoms is important. Learn how to prevent and treat nosebleeds. Nosebleeds usually are not serious and can be stopped by leaning forward and pinching the nostrils. Seek emergency help if your nosebleeds for more than 30 minutes or you lose a cup of blood or more. When to see a doctor Most nosebleeds aren't serious. They typically stop on their own or with the use of self-care steps. Although nosebleeds can cause concern, the amount of blood lost typically is less than it might seem. Most nosebleeds are minor and go away with at-home care. But if bleeding is severe or you have other symptoms (like vomiting or trouble breathing), you should go to the emergency room. Read about the causes of nosebleeds, how to treat them at home and when you should get medical advice. When should you worry about a nosebleed? Seek medical care for nosebleeds that last longer than 20 minutes or happen often enough to interfere with your life.