Every year in the UK, nearly one million people visit A&E following a brain injury. While many recover quickly, countless others are left with long-term challenges that change their lives forever. Yet despite how common brain injuries are, there’s still a lot of confusion around the different types, especially when it comes to terms like ABI and TBI.
In this post, we’ll explore what each of these terms mean, how they differ, what happens to the brain when it’s injured, and how recovery can look different for everyone.
Whether you’re living with a brain injury yourself, supporting someone who is, or simply want to understand more, we’re here to help.Whether you’re living with a brain injury yourself, supporting someone who is, or simply want to understand more, we’re here to help.
What Is an Acquired Brain Injury (ABI)?
An acquired brain injury (ABI) refers to any damage to the brain that happens after birth. Unlike congenital or hereditary conditions, an ABI occurs due to an event or illness that happens during your lifetime.
Common causes of ABI include:
- Falls or accidents
- Road traffic collisions
- Strokes
- Tumours
- Infections
- Lack of oxygen to the brain (hypoxia)
The key thing to remember is that ABI is an umbrella term, as it covers all types of brain injuries that aren’t present from birth. This includes both traumatic injuries (caused by an external force) and non-traumatic ones (caused by internal factors like stroke or illness).
What is A Traumatic Brain Injury (TBI)?
A traumatic brain injury (TBI) is a type of ABI caused specifically by an external force or trauma to the head. This might happen in:
- Road traffic accidents
- Falls at home or at work
- Sports injuries
- Assaults or other violent incidents
When the brain experiences a sudden jolt, hit, or impact, it can move inside the skull and collide with the bone. This motion can stretch, tear, or bruise brain tissue, leading to damage that affects how the brain functions.
A TBI can range from mild to severe, and its effects depend on the type, location, and severity of the injury. Some people may experience short-term confusion or headaches, while others may have lasting issues with memory, movement, or mood.
My Brain Injury was caused from a bang to the head when falling after blacking out.
The Three Stages of a Brain Injury
When a traumatic brain injury occurs, there are typically three stages of damage:
1.Primary injury – This happens at the moment of impact. In many cases, there’s no open wound (known as a closed injury), but the brain can still be jolted violently inside the skull. In more severe cases, the brain may be penetrated or crushed by an object.
2.Secondary injury – This occurs shortly after the initial impact. Swelling or bleeding inside the skull can reduce oxygen flow to the brain, causing further damage.
3.Tertiary injury – These are complications that develop in the days or weeks that follow, such as bleeding, bruising, or blood clots. Because the skull is a fixed space, there’s very little room for the brain to swell. As pressure builds, it can squeeze blood vessels and restrict circulation, worsening the injury.
Understanding these stages can help explain why some symptoms appear immediately, while others develop later.
Concussion: The Mild End of the Spectrum
A concussion is often referred to as a mild traumatic brain injury (mTBI). It usually involves a brief or no loss of consciousness (typically less than 30 minutes) but that doesn’t mean it should be taken lightly.
Common symptoms include:
- Dizziness or loss of balance
- Nausea
- Confusion or memory problems
- Sensitivity to light or sound
- Blurred or distorted vision
Most people recover within a few weeks, but for others, symptoms can persist much longer, a condition known as post-concussion syndrome. Even mild head injuries can have serious effects, so it’s always important to seek medical advice if you’ve had a knock to the head.
The Human Side of a Brain Injury
Every brain injury is unique. Two people can experience the same type of trauma yet face completely different challenges. Some may struggle with speech or coordination, while others find that their memory, concentration, or emotional regulation is affected.
As someone who experienced a brain injury myself after a fall, I know firsthand how disorienting and frightening it can be. I don’t know exactly how long I was unconscious as I was alone at the time. Luckily, Jules came to check on me when I didn’t come out of the bathroom for a while, and quickly realised something was wrong.
Moments like that change your perspective on life. Recovery isn’t just about the physical healing, it’s about rebuilding confidence, learning to adapt, and finding new ways to thrive.
You can read more about my personal story in our book “What The Hell Just Happened”.
Returning to Work After a Brain Injury
One of the biggest challenges many people face after a brain injury is returning to work. Depending on which parts of the brain are affected, you might find it harder to remember things, process information, or stay focused. Fatigue and sensory overload can also make working life overwhelming at first.
That’s why having the right support and advice is so important. Our wonderful sponsors at Slater and Gordon have an expert team of employment lawyers from diverse backgrounds who specialise in helping people navigate workplace rights after a brain injury.
They’ll be joining us for our next webinar on Thursday 13th November at 5.30pm, where they’ll explain the laws that protect you and how to make a successful transition back into work. If you’d like to join, please register your place here.
Living With Brain Injury: Finding Support and Hope
It’s estimated that around 1.3 million people in the UK are living with a long-term disability related to a traumatic brain injury. That’s a huge number, and behind every statistic is a person trying to rebuild their life, relationships, and identity.
If you or someone you love has experienced a brain injury, you’re not alone. There are communities, professionals, and charities ready to help - including us here at Brain or Shine.
We’re dedicated to providing practical resources, personal stories, and supportive spaces to help you through recovery. Whether you’re in the early days of rehabilitation or years into your journey, there’s always hope and progress to be found.
Visit our resources page to find resources, stories, and upcoming events that can help you connect with others and continue your recovery journey.
Final Thoughts
Brain injuries - whether mild, moderate, or severe - can affect every aspect of life. Understanding the difference between ABI, TBI, and concussion helps us talk more clearly about these experiences and support each other more effectively.
At Brain or Shine, we believe in raising awareness, sharing stories, and building a community where everyone affected by brain injury feels seen, supported, and inspired.
If you want to learn more about the causes, symptoms, and long-term effects of brain injury, join our free community space “The Fatigue Hub” - and don’t forget to sign up for our upcoming webinars for expert advice and community connection.
Together, we can shine a light on brain injury and make sure no one faces recovery alone.