WebMD explains first aid steps for treating a bleeding cut or wound. NBDF is committed to curing blood & bleeding disorders, preventing complications, and empowering individuals & families through research, education & advocacy. Bleeding, hemorrhage, haemorrhage or blood loss, is blood escaping from the circulatory system from damaged blood vessels. Bleeding can occur internally, or externally either through a natural opening such as the mouth, nose, ear, urethra, genitalia or anus, or through a puncture in the skin. Internal bleeding happens when your blood vessels break and blood collects inside your body. There are several causes of internal bleeding that range in severity. Bleeding is the loss of blood, inside or outside the body. A hemorrhage is severe bleeding. Learn about the causes of bleeding and how to treat it. Unexplained bruises, dizziness, or severe fatigue? Learn the subtle yet serious signs of internal bleeding you shouldn't ignore. Bleeding can be caused by injuries, or it can be spontaneous. Spontaneous bleeding most commonly occurs with problems in the joints, or gastrointestinal or urogenital tracts, often in people who have a bleeding disorder or who take a blood thinning medicine. Find out what to do in case of hemorrhage, or bleeding. Discover how to recognize a medical emergency, the complications, and more. Types of hemorrhages range from minor (like a bruise) to major (like bleeding in your brain). If you can’t stop external bleeding or suspect internal bleeding, get immediate medical help. This article will discuss the different types of bleeding in more detail, including internal and external bleeding, and provide tips for first aid.