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.
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.
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.
|National Center for Injury Prevention and Control (NCIPC) The website of NCIPC contains a variety of injury prevention information.|
|American 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.|
|National Athletic Trainers' Association This site contains information on certified athletic trainers and tips on preventing and healing sports injuries.|
|American 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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|Jumper's Knee Jumper's knee is an inflammation or injury of the patellar tendon. Although it can seem minor, it's actually a serious condition that can get worse over time and ultimately require surgery if not treated.|
|Jumper's Knee (Patellar Tendonitis) Jumper's knee is an inflammation or injury of the patellar tendon. Although it can seem minor, it's actually a serious condition that can get worse over time and ultimately require surgery if not treated.|
|Medial Collateral Ligament (MCL) Injuries MCL injuries - which are common in active and athletic kids - happen when excessive pressure is put on the knee joint, resulting in a torn ligament.|
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|Knee Injuries Knee injuries are common among young athletes. Learn about causes, treatments, and prevention.|
|Bruises This article is all about bruises, including why they happen, how to make them go away faster, and why they turn all those funny colors.|
|What's a Bruise? Have you ever had a bruise that turned a bunch of different colors before it went away? Find out why in this article for kids.|
|Problems With Legs and Feet Some kids have problems with their legs and feet. Find out more in this article for kids.|
|Anterior Cruciate Ligament (ACL) Injuries ACL injuries - which are common in active and athletic people - happen when excessive pressure is put on the knee joint, resulting in a torn ligament.|
|Knee Injuries Healthy knees are needed for many activities and sports and getting hurt can mean some time sitting on the sidelines.|
|Medial Collateral Ligament (MCL) Injuries MCL injuries - which are common in active and athletic teens - happen when excessive pressure is put on the knee joint, causing a torn ligament.|
|Sports and Exercise Safety Playing hard doesn't have to mean getting hurt. The best way to ensure a long and injury-free athletic career is to play it safe from the start. Find out how.|
|Meniscus Tears The key to healing meniscus tears is not to get back into play too quickly. Find out what meniscus tears are and how to treat them.|
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