Most everyday memory lapses in later life reflect normal age-related change rather than disease, but persistent or worsening difficulty that interferes with daily function is worth assessing with a GP. The useful distinction is not "good memory versus bad memory" but rather a spectrum: normal ageing, mild cognitive impairment, and dementia each describe different degrees and patterns of change. Importantly, mild cognitive impairment does not inevitably progress, and some people return to normal cognition over time. Knowing where ordinary change ends and a clinical concern begins is what makes the difference between needless worry and timely action.
Normal age-related change
The healthy ageing brain processes some information more slowly and retrieves names and words less readily. Walking into a room and forgetting why, momentarily misplacing keys, or needing a beat longer to recall an acquaintance are consistent with this. The defining feature of normal change is that it does not meaningfully disrupt independent daily functioning. The person still manages finances, medications, appointments and familiar routines, even if some tasks take longer. In mechanistic terms, the system is slower, not failing.
Mild cognitive impairment
Mild cognitive impairment (MCI) describes measurable cognitive change that is greater than expected for age but does not substantially impair independent daily living (Petersen et al., 2018). It is a category between normal ageing and dementia, and its course is genuinely variable. A 2025 study that summarised the research found that prognosis depends heavily on setting: dementia risk is higher among people seen in specialist clinics than among people in the general community, and a return to normal cognition was about three times more likely in studies that followed people from the general community (Salemme et al., 2025). The practical point is that MCI is not a sentence; it is a reason for monitoring and review.
Dementia, and what raises concern
Dementia involves cognitive decline significant enough to interfere with everyday independence. The features that warrant prompt review include forgetting recently learned information repeatedly, difficulty completing familiar tasks, getting lost in familiar places, problems following or joining conversations, misplacing items in implausible locations, and changes in judgement, mood or personality noticed by others. A 2024 expert report that summarised dementia research worldwide found that around 1 in 2 cases of dementia (45%) are potentially preventable by addressing 14 modifiable risk factors at different stages during the life course (Livingston et al., 2024), which is why review is worthwhile rather than fatalistic. In Australia, dementia was the second overall leading cause of disease burden in 2024 (behind coronary heart disease) and the leading cause for women, with an estimated 425,000 Australians living with dementia, a figure projected to rise around 2.5-fold to more than 1.1 million by 2065 (Australian Institute of Health and Welfare, 2025).
The differential question to bring to a GP is not "am I forgetful" but "has my function changed". A GP can take a history, consider reversible contributors such as medication effects, thyroid problems, sleep, depression or vitamin deficiency, conduct cognitive screening, and refer for fuller assessment if warranted. It is worth noting that depression and anxiety can themselves impair memory and concentration, which is one more reason the assessment belongs with a clinician rather than a self-test. The question "should I worry" can be replaced with a sharper, calmer one: "has anything changed in what I can actually do, and has anyone close to me noticed?" That reframe converts diffuse anxiety into a concrete observation a GP can work with. The companion page on when forgetting matters and when it does not develops the distinction further.
For how we work with older adults, what sessions cost, and how to begin, see Working with older adults.
