Bleeding is the loss of blood. It can happen inside or outside the body. Bleeding can be a reaction to a cut or other wound. It can also result from an injury to internal organs.
There are many situations in which you might bleed. A bruise is bleeding under the skin. Some strokes are caused by bleeding in the brain. Other bleeding, such as gastrointestinal bleeding, coughing up blood, or vaginal bleeding, can be a symptom of a disease.
Normally, when you bleed, your blood forms clots to stop the bleeding. Severe bleeding may require first aid or a trip to the emergency room. If you have a bleeding disorder, your blood does not form clots normally.
- Anemia Due to Excessive Bleeding (Merck & Co., Inc.)
- Cerebral Cavernous Malformation and Hemorrhage (Angioma Alliance)
- Hematuria (Blood in the Urine) (National Institute of Diabetes and Digestive and Kidney Diseases)
- Intracerebral Hemorrhage (Washington University, School of Medicine)
- Intracranial Hematoma (Mayo Foundation for Medical Education and Research)
- MedlinePlus: Gastrointestinal Bleeding (National Library of Medicine) Available in Spanish
- MedlinePlus: Vaginal Bleeding (National Library of Medicine) Available in Spanish
- Nosebleeds (American Academy of Family Physicians) Available in Spanish
- Subarachnoid Hemorrhage (American Academy of Neurology) - PDF
- Subconjunctival Hemorrhage (Broken Blood Vessel in Eye) (Mayo Foundation for Medical Education and Research)
Journal ArticlesReferences and abstracts from MEDLINE/PubMed (National Library of Medicine)
- Hematology Glossary (American Society of Hematology)
- Blood in the Urine (Hematuria) (For Parents) (Nemours Foundation) Available in Spanish
- Blood in the Urine (Hematuria) in Children (Beyond the Basics) (UpToDate)
- Dealing with Cuts (For Parents) (Nemours Foundation) Available in Spanish
- Going with the Flow of Nosebleeds (Nemours Foundation) Available in Spanish
- Nosebleeds (For Parents) (Nemours Foundation) Available in Spanish
- What's a Scab? (Nemours Foundation) Available in Spanish