A contusion or bruise is caused by damaged blood vessels due to a blow to the skin. Learn about the different types of contusions, such as muscle, head, bone, foot, hip, pulmonary and knee, and how to treat them. Contusions are bruises that occur when you sustain a blow or force causing trauma. Learn how to diagnose, treat and prevent contusions, and when to see a doctor for serious cases. cerebral contusion contusion of the brain following a head injury. It may occur with extradural or subdural collections of blood, in which case the patient may be left with neurologic defects or epilepsy. (See also cranial hematoma.) A bruise , also known as a contusion , is a type of hematoma of tissue, [3] the most common cause being capillaries damaged by trauma, causing localized bleeding that extravasates into the surrounding interstitial tissues. Most bruises occur close enough to the epidermis such that the bleeding causes a visible discoloration. The bruise then remains visible until the blood is either absorbed by tissues or cleared by immune system action. Bruises which do not blanch under pressure can involve ...
