A to Z: Contusion (Bruise), Knee

A to Z: Contusion (Bruise), Knee

A to Z: Contusion (Bruise), Knee

May also be called: Bruise

A contusion (kun-TOO-zhun), or bruise, of the knee is an injury to the skin and underlying tissue of the knee.

More to Know

A contusion, or bruise, forms when soft tissue in the body is crushed but the skin doesn't break. When this happens, blood from broken capillaries (small blood vessels) near the skin's surface may leak out under the skin. With no place to go, the blood gets trapped, often forming a red or purplish mark that hurts when you touch it.

As a contusion heals, it may turn different colors, from red and purple to black and blue and then to green, yellow, and light brown before fading away.

Keep in Mind

Applying a cold compress to a contusion may help minimize swelling and bruising. Seek medical attention if a contusion doesn't heal or continues to be painful.

All A to Z dictionary entries are regularly reviewed by KidsHealth medical experts.





Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.

© 1995-2014 The Nemours Foundation/KidsHealth. All rights reserved.





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Related Resources
Web SiteNational Center for Injury Prevention and Control (NCIPC) The website of NCIPC contains a variety of injury prevention information.
OrganizationAmerican Academy of Pediatrics (AAP) The AAP is committed to the health and well-being of infants, adolescents, and young adults. The website offers news articles and tips on health for families.
OrganizationNational Athletic Trainers' Association This site contains information on certified athletic trainers and tips on preventing and healing sports injuries.
OrganizationAmerican Academy of Family Physicians This site, operated by the American Academy of Family Physicians (AAFP), provides information on family physicians and health care, a directory of family physicians, and resources on health conditions.
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