A bruise is a mark on your skin caused by blood trapped under the surface. It happens when an injury crushes small blood vessels but does not break the skin. Those vessels break open and leak blood under the skin.
Bruises are often painful and swollen. You can get skin, muscle and bone bruises. Bone bruises are the most serious.
It can take months for a bruise to fade, but most last about two weeks. They start off a reddish color, and then turn bluish-purple and greenish-yellow before returning to normal. To reduce bruising, ice the injured area and elevate it above your heart. See your health care provider if you seem to bruise for no reason, or if the bruise appears to be infected.
- Bruises (Nemours Foundation)
Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)
- Article: Pulmonary contusion during the COVID-19 pandemic: challenges in diagnosis and treatment.
- Article: Prognostics of Hospitalization Length and Mortality in Patients with Traumatic Frontal...
- Article: Bruise detection and visibility under alternate light during the first three...
- Bruises -- see more articles