It can be caused by brain trauma, or it can occur spontaneously in hemorrhagic stroke. Non-traumatic intracerebral hemorrhage is a spontaneous bleeding into the brain tissue. Non-traumatic can refer to increased excertion, tension or stress.
see Spontaneous intracerebral hemorrhage
Intracerebral hemorrhage from ruptured cerebral arteriovenous malformation.
see Traumatic intracerebral hemorrhage