The Dementia Diagnosis

Should you explain a dementia diagnosis to the person?

When someone is diagnosed with dementia, families often ask the same question:

“Should we tell them they have dementia – will it help, or is there no point if they’re just going to forget?”

There is no single answer that fits everyone, but there are clear principles from UK law and guidance that can help families and professionals make thoughtful, compassionate decisions.

The starting point: a right to know

In the UK, adults are presumed to have capacity to make their own decisions unless there is clear evidence to the contrary. The Mental Capacity Act is designed to protect and empower people who may have difficulties with decision-making, including some people living with dementia. It applies to decisions about care, treatment and day-to-day life and says that people should be supported to make decisions for themselves wherever possible.

Guidance on dementia builds on this by recommending that, at diagnosis, people with dementia and their families or carers (as appropriate) are given clear oral and written information about:

• the type of dementia
• the changes that may be expected as the condition progresses
• who is involved in their care and how to contact them
• their legal rights and responsibilities
• how to access support and advice.

So the default position is:

Yes – the person should normally be told their diagnosis and offered information, in a way they can understand, unless there is a strong, documented reason not to.

This respects the person’s autonomy and gives them a chance to ask questions, express their wishes and be involved in planning.

How the person experiences the diagnosis

People respond very differently when they are told they have dementia. Some describe feeling relief that there is finally an explanation for the changes they have been experiencing; others feel fear, sadness, anger – or a mix of all of these.

For some, naming the diagnosis helps things make sense:

• “So that’s why my memory’s been changing.”
• “Now I know what I’m dealing with.”

For others, the word “dementia” is overwhelming or frightening, especially if past experiences or cultural messages have been very negative.

It is important to remember that the diagnosis is a process, not a single moment. People often need time, repetition, and emotional support to come to terms with it – and some may choose not to dwell on the label at all.

When the person can’t retain the information

A very common concern is: “They forget as soon as we tell them – is there any point?”

Memory changes can mean that a person does not retain the information about their diagnosis. That does not make the first conversation pointless. It can still:

• honour their right to know
• allow them, in that moment, to make sense of what is happening
• give them an opportunity to express wishes or worries there and then.

However, if the person cannot remember the diagnosis later, repeatedly reminding them of it in full every time they ask may not be kind or helpful.

In a similar way to other distressing truths (for example, the death of a family member), retelling the full story over and over can mean the person experiences the shock of bad news as if for the first time each time they are told. Some carers choose to tell the person initially, but not repeat the news if it becomes a recurring question, focusing instead on comfort and reassurance.

The same principle can be applied to the dementia diagnosis itself:

It may be appropriate to share the diagnosis once (or a small number of times), but not to keep “breaking the bad news” again and again if it only causes repeated distress.

Matching the explanation to the person

Good dementia care guidance emphasises involving people with dementia in decisions and providing information that is relevant to their circumstances and stage of the condition, using adapted communication if needed.

In practice, that means thinking about:

• How much detail they usually like. Some people want the name of the condition and information about treatment, driving, benefits and future planning. Others prefer gentler language such as “memory problems” or “changes in how the brain is working”.
• Their emotional capacity at that moment. If the person is already very anxious or upset, it may be better to give a simpler, more reassuring explanation and come back to the details later when they are calmer.
• Their way of understanding the world. For example:
  • “You have an illness in the brain that makes memory and thinking harder. We’re going to work together to keep each day as comfortable and meaningful as possible.”
  • “Your brain is working differently now, so you might need more help with some things, and that’s okay.”

The aim is not to “drum in” the diagnosis, but to help the person feel safe, respected and understood.

When repeating the label is not helpful

There is no rule that says you must use the word “dementia” every time the person is confused or struggling. In fact, repeatedly reminding them “you have dementia” can easily become shaming or frightening without adding anything useful.

What you say should be guided by the person’s best interests and emotional well-being, not by a rigid commitment to always stating the full truth exactly as written in their records.

For example:

• If the person asks, “What’s wrong with me?” and seems ready for an honest answer, you might gently link their difficulties to the brain illness and, if appropriate, use the word dementia.
• If every time you mention dementia they become terrified or distressed, you may instead focus on reassurance and practical support:
  • “Your memory’s been a bit more tricky lately – I’m here to help.”
  • “Your brain is working differently now, so we’re doing things together.”

This is not about hiding everything from the person; it is about using language that reduces distress and supports their sense of security.

Why it still matters that carers know

Even if the person with dementia:

• cannot retain the diagnosis, or
• prefers not to talk about it again,

it remains crucial that carers and family do understand what is happening.

Carers who understand the diagnosis are better placed to:

• adjust expectations and avoid blaming the person for symptoms
• adapt communication and the environment
• seek appropriate support, benefits and services
• plan for the future while the person can still participate.

The key is to use that knowledge to improve day-to-day life – not to confront the person repeatedly with a label they may not be able to integrate.

So… does telling them help, or is there no point?

Putting it all together:

• Yes, it usually helps to tell the person at least once, in a way that suits their needs and preferences, because:
  • they have a right to know
  • it can validate their experiences
  • it allows them to be involved in decisions and planning while they can.
• There is usually very little benefit in repeatedly “breaking the news” if they cannot remember and it only causes fresh distress. Once the person has been told and given the chance to respond, it is reasonable – and often kinder – to shift the focus onto comfort, support and living as fully as possible in the present.
• Carers absolutely do need to know and understand the diagnosis, but that understanding is best used to strengthen connection, reduce friction and guide support, rather than to constantly remind the person that they “have dementia”.

A helpful rule of thumb is:

Tell the truth kindly, once or a few times, in a way they can manage. After that, let their feelings, not the label, guide how much you repeat.

Practical tips for explaining a diagnosis

• Choose the right moment. A calm, unhurried conversation works best. Avoid times of fatigue, anxiety or sensory overload.
• Use clear, simple language. “An illness in the brain is making memory and thinking harder” is often easier to understand than medical terms.
• Give information in small pieces. Pause, check how the person is feeling, and avoid overwhelming them with detail.
• Watch their emotional response. If they become distressed, step back from the label and focus on reassurance rather than explanation.
• Be ready to repeat gently. Some people will ask again because they cannot retain the information. Keep responses calm and compassionate.
• Don’t repeat bad news unnecessarily. If every repetition causes fresh upset, shift towards supportive language: “Your memory is tricky today – I’m here to help.”
• Offer practical hope. “We’ll take this one day at a time, and you won’t be on your own with it.”
• Invite questions. Even if the person forgets later, having a moment to ask what matters to them can be meaningful.
• Follow their lead. Some will want to talk about the diagnosis often; others will prefer to move on. Either is okay.
• Remember your own support. Carers need space to process the diagnosis too. Knowing what is happening helps you adapt and support the person more effectively.

What this might look like in real life

A daughter notices her mum has been increasingly worried about her memory. One afternoon, when they are both calm and relaxed, she says:

“Mum, the doctor’s checked everything and they’ve found that there’s an illness in the brain that’s making your memory harder. It’s something lots of people experience as they get older. You’re not on your own – I’ll be here with you, and we’ll manage things together.”

Her mum nods, asks one or two gentle questions, and they talk for a short while.

A few days later, her mum asks again why she is “not thinking properly today”. The daughter can see she is anxious. Instead of restating the full diagnosis, she responds with:

“Your memory’s just having a difficult day. Let’s take things slowly – I’m here with you.”

Her mum relaxes, and they carry on with the day.

In this situation, the daughter honoured her mum’s right to know, gave information in a way she could manage, and then adjusted her approach later based on her mum’s emotional state. The diagnosis was not hidden – but it was not used to frighten or overwhelm her either.

Useful Resources & Guidance

• Tips about telling people that you have dementia — guidance from Alzheimer’s Society on when and how to tell someone about a dementia diagnosis, with patient and family perspectives.
• Diagnosis: Informing the Person with Dementia (help-sheet) — a clear, practical leaflet discussing reasons for telling (or not), and suggestions for families on how to approach disclosure.
• How to communicate with a person with dementia — Alzheimer’s Society advice on planning conversations, adapting communication to the person’s needs, and using simple, supportive language.
• Breaking difficult news to a person with dementia — guidance from Dementia UK (via its Helpline service) about the challenges of sharing difficult or distressing information (such as a diagnosis or other bad news) with someone living with dementia.
• NICE Guideline NG97: Dementia – assessment, management and support for people living with dementia and their carers — the official UK-wide clinical guideline covering diagnosis, disclosure, support and care planning. Useful as a reference for good-practice and rights-based approach to diagnosis and communication.
• “Barriers and Best Practices in Disclosing a Dementia Diagnosis” (Wollney et al., 2022) — a peer-reviewed paper exploring real-world challenges and clinician recommendations for dementia diagnosis disclosure; helpful for understanding complexity, stigma, and communication strategies.
• “Disclosing a dementia diagnosis: what do patients and carers want?” (2024) — recent research examining preferences of people with dementia and their families regarding the disclosure of diagnosis, useful evidence for person-centred decision making.
• “Appropriate disclosure of a diagnosis of dementia” (Lecouturier et al., 2008) — a detailed literature review and consensus-based recommendations for disclosure practices, balancing the needs of people with dementia and their carers.