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Alternative Names Return to top
Blood loss; Open injury bleedingDefinition Return to top
Bleeding refers to the loss of blood. Bleeding can happen inside the body (internally) or outside the body (externally). It may occur:
Considerations Return to top
Always seek emergency assistance for severe bleeding, and if internal bleeding is suspected. Internal bleeding can rapidly become life threatening, and immediate medical care is needed.
Serious injuries don't always bleed heavily, and some relatively minor injuries (for example, scalp wounds) can bleed quite a lot. People who take blood-thinning medication or who have a bleeding disorder such as hemophilia may bleed excessively and quickly because their blood does not clot properly. Bleeding in such people requires immediate medical attention.
Direct pressure will stop most external bleeding, and is the most important first aid step.
Always wash your hands before (if possible) and after giving first aid to someone who is bleeding, in order to avoid infection.
Try to use latex gloves when treating someone who is bleeding. Latex gloves should be in every first aid kit. People allergic to latex can use a non-latex, synthetic glove. You can catch viral hepatitis if you touch infected blood, and HIV can be spread if infected blood gets into an open wound -- even a small one.
Although puncture wounds usually don't bleed very much, they carry a high risk of infection. Seek medical care to prevent tetanus or other infection.
Abdominal and chest wounds can be very serious because of the possibility of severe internal bleeding. They may not look very serious, but can result in shock. Seek immediate medical care for any abdominal or chest wound. If organs are showing through the wound, do not try to push them back into place. Cover the injury with a moistened cloth or bandage, and apply only very gentle pressure to stop the bleeding.
Blood loss can cause bruises (blood collected under the skin), which usually result from a blow or a fall. They are dark, discolored areas on the skin. Apply a cool compress to the area as soon as possible to reduce swelling. Wrap the ice in a towel and place the towel over the injury. Do not place ice directly on the skin.
Causes Return to top
Bleeding can be caused by injuries or can occur spontaneously. Spontaneous bleeding is most commonly caused by problems with the joints or the gastrointestinal or urogenital tracts.
Symptoms Return to top
Symptoms of internal bleeding may also include:
First Aid Return to top
First aid is appropriate for external bleeding. If bleeding is severe, or if shock or internal bleeding is suspected, get emergency help immediately.
DO NOT Return to top
When to Contact a Medical Professional Return to top
Seek medical help if:
Prevention Return to top
Use good judgment and keep knives and sharp objects away from small children.
Stay up-to-date on vaccinations, especially the tetanus immunization.
References Return to top
Cornwell EE. Initial approach to trauma. In: Tintinalli JE, Kelen GD, Stapczynski JS, Ma OJ, Cline DM, eds. Emergency Medicine: A Comprehensive Study Guide. 6th ed. New York, NY: McGraw-Hill; 2004: chap 251. Update Date: 1/15/2009 Updated by: Jacob L. Heller, MD, Emergency Medicine, Virginia Mason Medical Center, Seattle, Washington, Clinic. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.