How can 'intracerebral hemorrhage' occur after a head injury?

Intracerebral hemorrhage occurs specifically when trauma leads to the rupture of blood vessels within the brain tissue itself. This type of bleeding typically results from blunt force trauma, such as that experienced in a head injury, which can cause the delicate blood vessels in the brain to tear. The rupture can lead to bleeding directly into the brain's tissues, resulting in a collection of blood that puts pressure on the surrounding neurons and can interfere with brain function. This situation is particularly dangerous as it can cause increased intracranial pressure, further complicating the injury and potentially leading to severe neurological deficits or fatalities.

The other options do not accurately describe how intracerebral hemorrhage can occur. Bruising on the skull surface does not directly result in bleeding within the brain itself, swelling of brain tissue refers to edema rather than hemorrhage, and a build-up of cerebrospinal fluid pertains to conditions like hydrocephalus, which is unrelated to the direct rupture of blood vessels in a head injury scenario.