In plain English
Forgetting names, misplacing keys and walking into a room and forgetting why are common at every age, and usually mean nothing worrying. Dementia is different: the changes are persistent, they get worse over time, and they begin to interfere with everyday life. This page explains how clinicians tell the two apart, and when it is worth seeing your GP.
Normal age-related change
As we get older, thinking can become a little slower and the occasional lapse is entirely normal. The key feature of normal ageing is that it does not stop you living independently. Typical examples include:
- Sometimes forgetting a name or a word, then remembering it later.
- Occasionally misplacing everyday objects but being able to retrace your steps.
- Walking into a room and briefly forgetting why.
- Needing a moment longer to learn something new.
- Forgetting which day it is, then quickly working it out.
These lapses are intermittent, they do not get steadily worse, and they do not stop you managing your home, finances or relationships.
Changes that are worth checking
Dementia tends to show a different pattern. The changes are more frequent, they progress, and they start to affect daily life. Warning signs include:
- Memory loss that disrupts daily life, such as repeatedly forgetting recent conversations or events, or asking the same question again and again.
- Difficulty doing familiar tasks, such as following a recipe, managing money or using a familiar appliance.
- Trouble finding the right words, losing the thread of a conversation, or struggling to follow what others say.
- Becoming confused about time or place, for example losing track of dates or becoming disorientated somewhere familiar.
- Poor judgement or decisions that are out of character, including with money.
- Misplacing things in unusual places and being unable to retrace steps.
- Changes in mood or personality, withdrawal from work or social life, or new anxiety or suspicion.
The pattern matters more than any single event. It is the combination of persistence, progression and interference with daily life that distinguishes dementia from ordinary forgetfulness.
It is not always dementia
Many things other than dementia can affect memory and concentration, and several are treatable. Depression and anxiety, poor sleep or sleep apnoea, thyroid problems, Vitamin B12 deficiency, the side effects of some medicines, alcohol, recent illness or surgery, and uncorrected hearing or vision problems can all cause cognitive symptoms. This is one reason a proper assessment is worthwhile: it can identify a reversible cause. See when the assessment finds no diagnosis and Functional Cognitive Disorder.
There is also a middle ground, Mild Cognitive Impairment, where there is a measurable change that does not yet interfere with independent living.
When to see your GP
Consider making a GP appointment if memory or thinking problems are persistent, getting worse, or starting to affect daily life, or if family members have noticed a change. It often helps to keep a brief diary of examples and rough dates beforehand, and to bring someone who knows you well. A clear timeline helps the clinician reach a confident view and reduces the risk of a missed or delayed diagnosis.
There is no downside to checking. If it is not dementia, you will have reassurance and perhaps a treatable explanation. If it is, early assessment opens the door to treatment, planning and support at the most useful time.
Frequently asked questions
Is forgetting names a sign of dementia?
On its own, usually not. Occasionally forgetting names and recalling them later is a normal part of ageing. It is more concerning when it is part of a wider, progressive pattern that affects daily life.
At what age should I start to worry about memory?
Age alone is not the trigger. What matters is whether symptoms are persistent, worsening, and interfering with everyday activities, at any age. Dementia can occur before 65 (young-onset), so do not dismiss symptoms because someone seems too young.
Can stress and low mood cause memory problems?
Yes. Depression, anxiety, poor sleep and stress commonly affect memory and concentration, and these are treatable. This is one reason an assessment is useful.
What will the GP do?
The GP will ask about symptoms and medical history, check for treatable causes, and may carry out a brief cognitive test and blood tests. If needed, they will refer to a memory clinic.
References
- National Institute for Health and Care Excellence. NG97: Dementia, assessment, management and support.
- NHS. Symptoms of dementia. https://www.nhs.uk/conditions/dementia/
- Alzheimer's Society. Dementia symptoms checklist. https://www.alzheimers.org.uk
