What Is a Brain Injury?

A brain injury occurs when the brain is damaged, either suddenly through trauma or gradually due to illness or repeated impact. Brain injuries are generally divided into two main categories:

1. Traumatic Brain Injury (TBI)

A traumatic brain injury (TBI) happens when an external force damages the brain. This can range from mild to severe.

Common causes include:

• Falls
• Road traffic collisions
• Sporting injuries
• Assault or domestic abuse
• Military blast exposure
• Workplace accidents

TBIs can be:

• Mild (concussion) – temporary disruption of brain function
• Moderate
• Severe – prolonged unconsciousness or significant brain damage

Repeated concussions or sub-concussive impacts can increase the risk of long-term complications, including neurodegenerative conditions.

2. Acquired Brain Injury (ABI)

An acquired brain injury (ABI) is damage to the brain that occurs after birth but is not caused by trauma.

Common causes include:

• Stroke
• Brain tumours
• Brain infections (e.g., meningitis, encephalitis)
• Lack of oxygen (hypoxia)
• Substance misuse
• Neurological illnesses

3. Chronic Traumatic Encephalopathy (CTE)

CTE is a progressive neurodegenerative condition associated with repeated head impacts. It has been linked to contact sports, military service, and other environments involving repetitive brain trauma.

Symptoms may include:

• Memory problems
• Mood changes
• Impulsivity
• Depression
• Cognitive decline

Currently, CTE can only be definitively diagnosed after death, but clinicians may diagnose Traumatic Encephalopathy Syndrome (TES) based on symptoms and history.

Common Symptoms of Brain Injury

Symptoms vary depending on the area of the brain affected and severity of injury. They may include:

Cognitive:

• Memory problems
• Poor concentration
• Slowed thinking
• Difficulty planning or organising

Physical:

• Headaches
• Dizziness
• Fatigue
• Balance problems
• Sensitivity to light or noise

Emotional & Behavioural:

• Anxiety
• Depression
• Irritability
• Personality changes
• Sleep disturbances

Symptoms may appear immediately or develop over weeks, months, or even years.

How Brain Injuries Are Diagnosed in the NHS

Diagnosis depends on the type and severity of injury.

Emergency Assessment:

For acute injuries (such as after a fall or collision), assessment usually happens in A&E.

Doctors may use:

• The Glasgow Coma Scale (GCS) to assess consciousness
• A neurological examination
• A CT scan (often first-line imaging in emergency settings)
• An MRI scan (for more detailed imaging)
• Not all concussions show up on scans. A normal scan does not always mean the brain is fully recovered.

GP Referral and Specialist Assessment

For ongoing or delayed symptoms, your GP is usually the first point of contact.

They may:

• Assess symptoms and medical history
• Refer to a neurologist or neuropsychiatrist
• Refer to a memory clinic (for suspected cognitive decline)
• Refer to a specialist brain injury rehabilitation team
• Neuropsychological assessments may be used to evaluate memory, processing speed, mood, and executive functioning.

Referral to neurology, psychiatry, or specialist memory services may be part of the pathway.

Treatment and Support Within the NHS

Treatment depends on the type and severity of injury.

Acute Treatment

For moderate to severe TBIs, hospital care may include:

• Monitoring in a neurosurgical unit
• Surgery (if there is bleeding or swelling)
• Medication to manage symptoms
• Intensive care support

Rehabilitation

Rehabilitation is often the most important stage of recovery.

This may include:

• Physiotherapy – mobility and balance
• Occupational therapy – daily living skills
• Speech and language therapy – communication and swallowing
• Neuropsychology – cognitive rehabilitation
• Mental health support – managing anxiety, depression, trauma

Community neuro-rehabilitation teams may be involved after discharge.

Symptom Management

For long-term symptoms, treatment may focus on:

• Pain management
• Sleep support
• Medication for mood or behavioural symptoms
• Cognitive rehabilitation strategies
• Social care support

There is currently no cure for CTE, but supportive care can significantly improve quality of life.

Challenges Within the System

While the NHS provides critical care and rehabilitation services, many people report challenges including:

• Difficulty obtaining referrals
• Limited awareness of long-term effects of repeated concussion
• Delays in accessing specialist services
• Lack of clear pathways for suspected CTE

Advocacy and education are vital to improving understanding and access to care.

Moving Forward With Support

A brain injury diagnosis can feel overwhelming. But understanding the type of injury, knowing what support is available, and connecting with specialist services can make a significant difference.

If you or a loved one are experiencing symptoms following a head injury, it is important to seek medical advice through your GP or A&E.

And remember — you are not alone. Support, community, and trusted information can help you navigate the journey ahead.