Recognising Cognitive Decline in an Older Relative: What to Watch For and What to Do

Normal Ageing vs Something That Needs Attention

Some degree of cognitive change is a normal part of ageing. Finding it harder to recall a name immediately, needing more time to learn new things, occasional word-finding difficulties: these are experiences that most people have to some degree as they get older, and they do not necessarily indicate a significant underlying condition.

The challenge for families is distinguishing these normal age-related changes from signs that something more significant is happening. Getting this distinction wrong in either direction has costs. Dismissing genuine early signs of dementia delays diagnosis and the support that can follow from it. Misreading normal ageing as dementia causes unnecessary alarm and can be deeply distressing for the older person concerned.

This guide does not enable families to make their own diagnoses. What it does is describe the signs that are worth seeking a GP assessment for, and the ways to approach that process sensitively and effectively.

Signs That Are Worth Taking Seriously

Memory problems that affect daily functioning, rather than occasional forgetfulness, are the most commonly recognised sign. The distinction matters: forgetting where you put your keys and finding them quickly is normal. Forgetting that you own keys, being unable to find familiar objects repeatedly and not remembering having looked for them, or forgetting recent events that would normally be memorable (a grandchild's visit, a hospital appointment) warrants attention.

Difficulty with familiar tasks is another significant indicator. Struggling to follow a recipe that has been made dozens of times, having difficulty managing finances or paperwork that was previously handled easily, getting lost in a familiar neighbourhood, or losing track of how to use devices or appliances that have been used for years are all more concerning than simply finding new technology confusing.

Language difficulties beyond occasional word-finding include trouble following conversations, losing track of what was just said, repeating the same question or story multiple times in a single conversation (without awareness of having done so), and difficulty reading or writing that was not previously present.

Changes in mood and personality that are marked and persistent deserve attention. Becoming significantly more anxious, suspicious, withdrawn, or disinhibited (saying or doing things that would previously have been out of character) can be an early feature of some forms of dementia, rather than simply becoming more difficult with age.

Poor judgement and decision-making, including unusual purchases, being taken in by obvious scams, giving money to strangers, or making financial decisions that seem entirely out of character, can be early signs of cognitive decline affecting the frontal lobe functions responsible for planning, judgment, and impulse control.

The Conditions That Can Mimic Dementia

Several treatable conditions produce symptoms that overlap significantly with dementia, which is one of the reasons that seeking a proper medical assessment rather than accepting a family conclusion is so important. Depression in older adults very commonly presents with cognitive symptoms including poor concentration, memory difficulties, and slowed thinking. Thyroid problems, vitamin B12 deficiency, urinary tract infections (which can cause acute confusion in older adults), dehydration, and medication side effects can all affect cognition significantly and are all reversible with appropriate treatment.

This is an important point to make to older relatives when raising the subject of a GP assessment: the purpose of seeing a doctor is not to confirm a fear but to find out what is actually happening, which may turn out to be something entirely treatable.

How to Raise the Subject

Raising concerns about cognitive decline with an older relative is one of the most sensitive conversations a family member can have. The subject touches on identity, independence, and the fear of being a burden or being taken over by others. It is almost always worth approaching with as much care as directness.

Choose a calm, private moment with sufficient time for a proper conversation. Approach it from a position of love and concern rather than alarm or decision-making. "I've noticed a few things lately that I wanted to talk to you about, because I care about you and want to make sure everything's okay" is a much more effective opener than a list of concerns delivered in a way that feels like an accusation or a verdict.

Focus on specific observations rather than general conclusions. "I've noticed you've mentioned a couple of times that you couldn't remember having spoken to Sarah recently" is more concrete and less threatening than "You seem to be forgetting everything." Specific observations are also more useful for a GP, who will want to know what has been noticed rather than a general family impression.

Offer to help with the next step, such as making a GP appointment and going along. Having a family member present at a GP appointment can be helpful both for providing the GP with an accurate picture of what has been observed (something the person themselves may not be able to give if their memory is affected) and for supporting the older person through what can be a frightening process.

What Happens After a GP Assessment

A GP who shares concerns about cognitive decline will typically arrange a memory assessment, which may be done at the surgery using standardised cognitive tests or through a referral to a memory clinic. A memory clinic assessment is more comprehensive and typically involves a doctor specialising in older adult psychiatry or neurology, as well as a neuropsychologist, and may include brain imaging.

A diagnosis of dementia, if that is what the assessment finds, is not the end of the story. Specialist post-diagnostic support, including from the Alzheimer's Society and Dementia UK's Admiral Nurse service, provides ongoing practical and emotional support for the person with dementia and for their family. Some forms of dementia respond to medication that slows progression. Knowing what is happening also enables practical planning, including setting up a Lasting Power of Attorney while the person still has the capacity to do so.

Acting on concerns early, while it may feel difficult in the short term, provides more time for planning, more options for support, and a better quality of life for both the person with dementia and for the family who loves them.