Early Signs of Dementia vs Normal Memory Changes

Everyone forgets things, and memory naturally slows a little with age. Dementia is different: it’s a progressive decline that affects daily life. Knowing the difference helps you act early, or stop worrying.

Imagine your father, who has managed the family finances for 40 years, suddenly missing bills and getting confused by the bank app. He’s also got lost driving to a shop he’s used for years. These aren’t “senior moments”. An early assessment leads to a diagnosis, treatment and time to plan together.

Normal ageing vs possible dementia

• Normal: forgetting a name but remembering later. Concerning: forgetting recent conversations or events entirely and repeating questions.
• Normal: occasionally losing keys. Concerning: putting things in odd places, like keys in the fridge, and being unable to retrace steps.
• Normal: occasional mistakes with bills. Concerning: new trouble managing money, planning or following recipes.
• Normal: sometimes searching for a word. Concerning: frequent word-finding problems or difficulty following conversations.
• Normal: forgetting the date briefly. Concerning: getting lost in familiar places or confused about time and place.

Other early signs include personality or mood changes, withdrawing from hobbies, poor judgement and, in some types of dementia, changes in behaviour or vision before memory.

But what else could cause memory problems?

Several treatable conditions can mimic dementia: depression, thyroid problems, vitamin B12 deficiency, infections (especially urine infections in older people), medicine side effects, sleep problems and hearing loss. That’s why a medical check matters before assuming the worst.

Why early diagnosis helps

An early diagnosis gives access to treatments that can help symptoms for a time, support services and the chance to make legal and financial plans while the person can take part fully. Keeping active, social and treating blood pressure and hearing loss may also help protect brain health.

Sources: World Health Organization (Dementia), Alzheimer’s Association, Alzheimer’s Society, Alzheimer’s Disease International, The Lancet Commission on dementia prevention.