Almost every family I meet asks me some version of this question, usually in a lowered voice in the kitchen: "Mum's been forgetting things. Is this… normal?" It's the right question, and it deserves a better answer than "probably fine" or a frightening internet checklist. Here is how we actually think about it on house calls.
Aging brains slow down. That's real, it's universal, and it isn't disease. An older adult may take longer to find a word, need a list at the grocery store, or walk into a room and briefly forget why. What matters is not whether memory changes — it's the shape of the change.
Forgetting where the keys are vs. forgetting what keys do
Normal aging misplaces the keys and finds them by retracing steps. Early dementia holds the keys and can't quite work out what they're for, or puts them somewhere that makes no sense — the freezer, the medicine cabinet — and has no memory of doing it. The first is a filing problem. The second is a processing problem, and it's the one that deserves an appointment.
The five differences we look for
Recent memory that cues can't bring back. Everyone forgets a conversation detail. In early dementia, the whole conversation is gone — and a reminder ("we talked about it at dinner, remember?") brings back nothing at all.
Familiar tasks getting unfamiliar. Not "slower at the banking website" — that's all of us. Watch instead for trouble with things done a thousand times: a signature recipe going wrong repeatedly, laundry steps out of order, getting turned around on a known route.
Words replaced, not just delayed. Pausing for a name is normal. Substituting around missing everyday words — "the thing you tell time with" — again and again, is not.
Judgment that isn't like them. Giving unusual amounts to phone solicitors, dressing wrong for the weather, decisions the person of ten years ago would never have made. Personality is information.
Who notices. This one surprises families: the person who complains most about their memory usually has a healthy brain that's noticing its own slowdowns. In early dementia it's more often the family that notices while the person insists nothing is wrong.
What to do with a "maybe"
You do not have to decide at the kitchen table — that's not your job, and honestly it isn't possible there. Your job is two things. First, write down what you're seeing, with dates. "Confused about the microwave, twice in March. Missed Aunt J's birthday call, unusual." Patterns over months are exactly what a doctor needs and exactly what nobody can remember in an appointment. Second, book the appointment — not to get a label, but because some causes of memory change are treatable: thyroid, B12, sleep apnea, depression, medication side effects. You want those found early, whatever else is true.
If the changes are happening over days rather than months, that's a different situation entirely — read when to call the doctor and when to go, because sudden confusion has its own rules.
The whole point
Families lose months to the "is it normal?" loop — watching, worrying, re-deciding weekly not to decide. The way out is on paper: track what you see, date it, and let a doctor look at the pattern with you. Whatever the answer turns out to be, you'll have lost no time — and if it is dementia, the earliest chapter is the one where planning helps most.