A hematoma is a collection of blood caused by the rupture of a blood vessel that spills out of the bloodstream. Cerebral hematoma is located in the brain and is linked to the failure of one or more blood vessels, which may be the case in a ruptured aneurysm (arterial malformation), a hemorrhagic stroke, or more often, a head injury. The cerebral hematoma can compress the structures in the skull and have serious consequences. The subdural, dural, or extra-dural hematomas can be distinguished depending on their location, relative to a protective membrane of the brain called the dura mater. The symptoms are not always immediate, but care must be quick to avoid potentially irreversible effects on the brain. A surgical treatment should be considered, sometimes urgently.