What is the difference between dementia and normal aging?

Every family asks this, and the dividing line is function: normal aging slows retrieval while dementia dismantles capability. Normal aging, per NIA's memory guidance: occasionally forgetting names and appointments but remembering them later, misplacing the glasses and retracing steps to find them, needing a moment for a word, making an occasional bad decision. Dementia: asking the same question repeatedly within minutes, getting lost in familiar places, forgetting how to do lifelong tasks - the coffee maker, the checkbook - poor judgment that is new and repeated, confusion about time and season, and personality or mood shifts. The test that matters: does it interfere with daily life - managing money, medications, meals, driving. Misplacing keys is aging; finding them in the freezer is a different category. What to do with suspicion: do not diagnose at the kitchen table, and do not wave it off either. A memory clinic or primary care visit gets the workup - and crucially, some confusion is reversible: medication side effects, thyroid problems, B12 deficiency, depression, infections, and poor sleep all imitate dementia and are checked first. Document before the appointment: specific incidents with dates, what changed and when, and medication lists - families underreport for years out of politeness, and the reversible causes get found faster with concrete examples. Pymander is a free AI doctor, 24/7 by text. Describe what you are seeing, and it can help you sort the pattern.