Bleeding

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Bleeding

Summary

Bleeding is the loss of blood. It can happen outside or inside the body. You may bleed when you get a cut or other wound. Bleeding can also be due to an injury to internal organs.

Sometimes bleeding can cause other problems. 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.

Start Here

Internal Bleeding (Merck & Co., Inc.) Also in Spanish

Diagnosis and Tests

Partial Thromboplastin Time (PTT) Test (National Library of Medicine) Also in Spanish

Treatments and Therapies

Severe Bleeding: First Aid (Mayo Foundation for Medical Education and Research) Also in Spanish
What do I need in my first aid kit? (American Academy of Family Physicians) Also in Spanish

Specifics

Anemia Due to Excessive Bleeding (Merck & Co., Inc.) Also in Spanish
Blood in Urine (National Library of Medicine) Also in Spanish
Cerebral Cavernous Angioma and Hemorrhage (Angioma Alliance)
Facts about Vitamin K Deficiency Bleeding (Centers for Disease Control and Prevention)
Gastrointestinal Bleeding: MedlinePlus Health Topic (National Library of Medicine) Also in Spanish
Intracerebral Hemorrhage (Washington University, School of Medicine)
Intracranial Hematoma (Mayo Foundation for Medical Education and Research) Also in Spanish
Nosebleeds (American Academy of Family Physicians) Also in Spanish
Subarachnoid Hemorrhage (American Academy of Neurology) - PDF
Subconjunctival Hemorrhage (Broken Blood Vessel in Eye) (Mayo Foundation for Medical Education and Research)
Vaginal Bleeding: MedlinePlus Health Topic (National Library of Medicine) Also in Spanish

Genetics

Genetics Home Reference: warfarin sensitivity (National Library of Medicine)

Videos and Tutorials

Blood clotting (Medical Encyclopedia) Also in Spanish

Clinical Trials

ClinicalTrials.gov: Hematoma (National Institutes of Health)
ClinicalTrials.gov: Hemorrhage (National Institutes of Health)

Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)

Reference Desk

Hematology Glossary (American Society of Hematology)

Find an Expert

Find a Hematologist (American Society of Hematology)
National Heart, Lung, and Blood Institute

Children

Blood in the Urine (Hematuria) (For Parents) (Nemours Foundation) Also in Spanish
Dealing with Cuts (For Parents) (Nemours Foundation) Also in Spanish
Going with the Flow of Nosebleeds (Nemours Foundation) Also in Spanish
Nosebleeds (For Parents) (Nemours Foundation) Also in Spanish
What's a Scab? (Nemours Foundation) Also in Spanish

Teenagers

Nosebleeds (Nemours Foundation) Also in Spanish

Patient Handouts

Bleeding (Medical Encyclopedia) Also in Spanish
Bleeding gums (Medical Encyclopedia) Also in Spanish
Bleeding into the skin (Medical Encyclopedia) Also in Spanish
Intraventricular hemorrhage of the newborn (Medical Encyclopedia) Also in Spanish
Subarachnoid hemorrhage (Medical Encyclopedia) Also in Spanish

Basics

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Research

Resources

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