People most suffer such injuries as:
Skull fracture
This can be caused by a traumatic injury to the head sustained
during, for example, a fall, an assault or a road traffic
accident.
Anoxic Brain Injury
A lack of oxygen to the brain which causes cells to die. Such
injury can occur during birth or carbon monoxide poisoning.
Concussion
This is basically bruising to the brain tissue and can cause
headaches, vomiting and dizziness. Concentration may also be
affected. It can be caused by a direct blow to the head, e.g. an
assault or falling and hitting the head on the floor.
Diffuse Axonal Injury
Depending on the force of the injury, nerve connections may be
damaged. If a nerve connection or pathway is damaged, this can have
devastating consequences. The injuries are microscopic and often
cannot be detected on MRI scans or CT scans. An individual with
such an injury can present a variety of functional impairments.
Haematoma
This is an accumulation of blood between the skull and the
lining of the brain (the dura). This can cause pressure changes in
the brain and emergency surgery may be necessary. Blood clots may
also be found deep in the middle of the brain. These are hard to
remove and can cause tissue damage. Surgery may be used to relieve
the pressure.