When brain injury can’t be seen: Why “hidden” disabilities need visible support

Many families tell us the same story: “They were discharged and told they were fine, but they were no longer the same person.” Acquired brain injury (ABI) is often a hidden disability. Outwardly, a person may look “recovered”, yet still live with profound changes in memory, attention, processing speed, communication, behaviour, and insight. The result can be devastating for the individual and those who love them. 

“He looks fine” — understanding unseen brain injury

Cognitive and communication difficulties after brain injury commonly includes problems with memory and attention, slowed processing, reduced executive function (planning and organising), and challenges with emotional regulation and self-awareness. These neurological changes can be mistaken for laziness, indifference, or poor judgement, when in fact they are well recognised consequences of brain injury.  

Families frequently shoulder the impact taking on supervision, prompting, and complex daily management often without adequate information or support, especially where discharge advice and follow ups have fallen short. 

How Leigh Day supports clients living with hidden brain injury

Our role goes beyond securing compensation. We help clients and families make sense of what has happened and access the right help at the right time. That includes:

• Investigating failures in diagnosis or discharge
• Working with independent experts to evidence the unseen effects of injury
• Ensuring claims reflect the true long-term impact on family life 

Once liability is admitted, we seek interim payments so clients aren’t left struggling while the full case progresses. These funds can cover immediate needs such as lost income, therapy, case management, equipment, and respite, easing pressure on families during a critical period.  

We instruct a multidisciplinary team of specialists such as neuropsychologists, speech and language therapists, occupational therapists, neuropsychiatrists, and case managers to assess cognition, communication, behaviour, fatigue, risks, and support needs at home, work, and in the community. This evidence underpins robust rehabilitation plans and ensures settlements are realistic and futureproof. 

Alex’s story: Living with the long-term effects of a hidden brain injury

We are instructed by Alex, who sustained a serious brain injury after a delay in diagnosing and treating viral encephalitis. This is an inflammation of the brain and can be caused by an infection invading the brain, or by the immune system attacking the brain in error. 

While the acute illness was eventually managed, the delay caused permanent damage to areas of his brain responsible for language, memory, processing and executive function. 

Liability has been admitted, and the case now focuses on understanding his long-term needs and securing appropriate lifelong support. 

Why Alex’s disability is “hidden”

Alex appears physically well and can sound articulate in short conversations. However, his speech can be superficially fluent yet unreliable in meaning. He struggles to follow complex or fast-paced information and to retain new details, which means he may appear to agree to things he has not fully understood which is common for people with an acquired brain injury.

Before the injury, Alex ran his own business, managed finances and administration, organised travel and enjoyed an active life. Now, he cannot manage financial, administrative or day-to-day decisions independently. He presents well on the surface, but his functional abilities are fundamentally worse than they appear. 

His wife Maya now manages all appointments, finances and correspondence, accompanies Alex to ensure understanding and safety, and provides ongoing supervision including in the kitchen and for personal care. Alex is reluctant to go out without Maya, which means she rarely gets respite and cannot work. She receives all household communication and filters information for Alex, who may still appear superficially engaged. She describes the experience as living with a stranger who needs constant supervision.

How we helped

We pursued the claim to secure an admission of liability and secured an interim payment to provide financial support while the case continues. This has helped relieve some of the immediate pressures arising from Alex’s inability to work and Maya’s role in providing daily supervision and support.

We worked closely with Alex and Maya to understand the full impact of Alex’s brain injury, including the hidden cognitive and communication difficulties that are not immediately apparent. We are now instructing specialist experts to map Alex’s long-term risks and needs. Their input will help ensure that the final settlement reflects the lifelong impact of this hidden disability and provides stability for both Alex and Maya. 

What this looks like at home: real-world risks and the need for supervision

The consequences of Alex’s brain injury have a tangible impact on every aspect of his life, including:

1. Unsafe cooking and kitchen behaviour: reduced judgement and insight can lead to serious safety risks, for example placing food under the grill whilst still in packaging, creating a fire hazard.
2. Personal care and swallowing safety: Alex needs supervision when eating and shaving, because of mild but persistent swallowing difficulties and attention, sequencing and safety-awareness problems which can cause him to cut himself whilst shaving.
3. Memory and organisation day to day: Alex repeatedly misplaces essential items including phones, keys, glasses and even items belonging to others with no recollection of doing so. He struggles with using computers despite attending a course and cannot follow recipes.
4. Impulsive or unsafe decision-making:  His decisions are often erratic and disconnected from context. For example, he decided on impulse to have a wall and trees removed without appreciating the implications. He is also vulnerable to exploitation due to being over-trusting with others and may make financial decisions which he later can’t describe or justify.
5. Reading, comprehension and daily information: Alex has stopped reading newspapers and struggles with spelling and writing. He finds it hard to understand or act on written information, and conversation understanding deteriorates with fatigue, which further impacts decision making and safety. 

Communication after brain injury

We frequently work with professionals like Robena Dhadda, who offer specialist insights into speech and language which are used to build cases for our clients with brain injuries. Robena has helpfully provided some of her own experiences and tips below.

Robena Dhadda, Consultant Speech and Language Therapist, Speech Tools Therapy

When communication looks intact

Brain injury does not always leave visible signs. Some of the most disabling consequences are hidden within language.

A person may sound articulate. Sentences may flow. Vocabulary may appear intact. Yet meaning is unreliable.

In cognitive-communication disorder and in aphasia, particularly fluent aphasia, speech can be grammatically formed but imprecise. Words are substituted. Ideas drift. Understanding breaks down when information becomes layered, abstract, or fast-paced. The difficulty is not producing speech; it is producing reliable meaning.

Because articulation sounds normal, listeners assume comprehension is intact. Conversations continue at speed. Decisions are made – which can lead to unforeseen consequences for anyone with a brain injury.

The illusion of competence

Many individuals develop subtle masking behaviours. They may nod and agree, or use phrases like ‘I don’t remember fully’ because it is easier than stopping the conversation.

Over time, this becomes automatic. Others move on, unaware that meaning has been lost.

Fluent speech can therefore increase vulnerability. When speech is visibly impaired, people instinctively slow down. When it sounds normal, they rarely do. The illusion of competence carries risk,  particularly in medical, financial or legal discussions where accuracy matters.

Written material presents a similar problem. A person may read words aloud accurately yet struggle to integrate or retain the message long enough to weigh it properly.

Communication and relationships

Good communication underpins almost every relationship we already have and those we form. It shapes trust, connection, shared understanding and decision-making.

When language becomes unreliable, relationships change. Partners often assume the role of interpreter, organiser and protector. Conversations require monitoring. Plans require checking, meaning the cognitive load of daily life shifts quietly onto one person.

Because the difficulty is invisible, this shift is rarely acknowledged. Social interactions can become taxing. Misunderstandings accumulate, reducing confidence. Friendships may narrow, not because personality has changed, but because sustaining communication has become harder.

The impact is not only cognitive. It is also relational.

Recovery plateaus

Several years after brain injury, neurological recovery typically stabilises. Therapy at this stage is not about cure. It is about reliability and awareness.

An essential goal is helping the individual recognise breakdown. Learning to say “I’m not sure I understand” is not regression; it is protection. Without that awareness, people may agree to plans simply because they do not realise meaning has slipped.

Fatigue, illness and ageing reduce compensatory reserve. Support needs may increase, not decrease.

Creating a safe communication environment

Effective support is not about simplifying someone’s world. It is about structuring it.

A safe communication environment slows pace, reduces pressure and preserves dignity. It allows uncertainty without embarrassment. When conversations are rushed or corrective, masking increases. When they are calm and structured, accuracy improves.

Practical tips to help when communicating include:

• Slow the pace and avoid layering information. 
• Break complex material into parts and confirm understanding by asking the person to explain back in their own words. 
• Encourage signalling of uncertainty rather than social agreement. 
• Provide written information that is structured, concise and meaningful. 
• Use visual frameworks, such as Talking Mats or similar supported-decision tools, to externalise reasoning and confirm shared understanding. 
• Recognise the hidden cognitive load carried by partners and involve them in structured communication planning.

Final thoughts

These insights are valuable to our medical negligence team at Leigh Day, providing us with the tools we need to communicate effectively with our clients and ensure they are empowered with the information they need throughout the progression of their case. Our priority throughout is to maintain transparency and make sure that our clients feel supported. 

Anyone with further questions about pursuing a medical negligence claim after brain injury can get in touch with our friendly team. 

Leigh Day also works with a number of brain injury charities who offer specialised support, including Encephalitis International, Child Brain Injury Trust and Headway.