Brain damage can cause a disruption in the functions of your brain. Symptoms that may be caused by injury to the brain include slowed thinking processes, difficulty switching between tasks, diminished libido, disturbed sleep, emotional outbursts, irritability, depression, faulty judgment, impaired memory, difficulty concentrating, inattention and excessive sleepiness. It is sometimes difficult to sort out actual brain damage from other ailments or issues including job loss, financial loss, depression, medications, pain elsewhere and migraine headaches.

Brain injury does not necessarily result in long-term impairment or disability, although the location and extent of damage both have a significant effect on the likely outcome. In serious cases of brain injury, the result can be permanent disability, including neurocognitive deficits, delusions (often specifically monothematic delusions), speech or movement problems, and mental handicap. There may also be personality changes. Severe brain damage may result in persistent vegetative state, coma, or death.

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