First Time User? Enroll now.
COVID-19: Vaccine information, visitor restrictions, and additional resources | Medicaid: The program is changing and you must take steps to keep your UNC Health providers
Home > Health Library > Bruises (contusions)
Bruises (contusions) occur when small blood vessels under the skin tear or rupture, most often from a twist, bump, or fall. Blood leaks into tissues under the skin and causes a black-and-blue color that often turns colors, including purplish black, reddish blue, or yellowish green, as the bruise heals.
Most bruises are not serious and will go away on their own within 2 to 4 weeks. Sometimes, gravity causes them to spread down the body. A leg bruise usually will take longer to heal than a bruise on the face or arms.
Severe bruising, swelling, and pain that begin within 30 minutes of an injury may mean a more serious injury, such as a severe sprain, dislocation, or fracture.
Sudden unexplained bruising or a sudden increase in the frequency of bruising may be a sign of an abnormal type of bruising that may be caused by medicine side effects, a bleeding or clotting disorder, or a medical condition.
Current as of: July 1, 2021
Author: Healthwise Staff
Medical Review:William H. Blahd Jr. MD, FACEP - Emergency Medicine & Adam Husney MD - Family Medicine
To learn more about Healthwise, visit Healthwise.org.
© 1995-2021 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.