If you’re noticing changes in your mom’s memory, behavior, or ability to handle everyday tasks, you’re right to pay attention. The difference between normal aging and dementia comes down to pattern and severity: everyone forgets a word or misplaces their keys occasionally, but dementia involves consistent, worsening problems that interfere with daily life. Here’s how to tell what you’re actually seeing and what to do about it.
Normal Aging vs. Early Dementia
The hardest part of recognizing dementia in a parent is that some forgetfulness is completely normal with age. The key is frequency and impact. The National Institute on Aging lays out some useful side-by-side comparisons:
- Decisions: Making a bad call once in a while is normal. Making poor judgments and decisions a lot of the time is not.
- Finances: Missing a monthly payment happens. Consistently struggling to manage bills is a warning sign.
- Time: Forgetting what day it is and remembering later is fine. Losing track of the date, the season, or the time of year is concerning.
- Conversation: Occasionally blanking on a word is normal. Having real trouble following or participating in a conversation is different.
- Belongings: Losing things from time to time is human. Misplacing items often and being completely unable to retrace steps to find them points to something more.
If you’re only seeing the left column, your mom is probably aging normally. If the right column sounds familiar, and these patterns are getting worse over time, it’s worth looking more closely.
Specific Signs to Watch For
Dementia affects more than just memory. It can show up in attention, communication, reasoning, judgment, problem solving, and even vision (like misjudging depth or not recognizing familiar objects). Early signs that warrant concern include getting lost in a familiar neighborhood, using odd substitute words for everyday objects, forgetting the name of a close family member, being unable to follow recipes or directions she used to handle easily, and losing the ability to complete routine tasks without help.
Pay special attention to repetition. Asking the same questions over and over in a single conversation, or retelling the same story multiple times without realizing it, is one of the most common early red flags. So is growing confusion about people and places she’s known for years.
Self-care changes matter too. If your mom has stopped eating well, isn’t keeping up with bathing or grooming, or is behaving in ways that seem unsafe (leaving the stove on, wandering outside at odd hours), those are signs the decline is affecting her ability to care for herself.
Physical Changes You Might Notice
Dementia isn’t only a cognitive problem. Research published in The Lancet Healthy Longevity found that motor decline, particularly changes in walking, often shows up before obvious memory problems. If your mom’s gait has become slower or unsteady, if she’s shuffling, losing her balance more often, or struggling with coordination, those physical shifts may be connected to the same underlying brain changes that cause cognitive symptoms.
In some cases, motor decline preceded cognitive decline by several years, particularly when caused by vascular problems (reduced blood flow in the brain). So if you’re noticing your mom moving differently and also seeming a bit “off” mentally, those two things may not be separate issues.
It Might Not Be Dementia
This is genuinely important: several treatable medical conditions look a lot like dementia. Before assuming the worst, know that the following can all cause confusion, memory problems, and personality changes in older adults:
- Vitamin deficiencies: Low vitamin B-12, thiamin (B-1), or other nutrients can directly impair brain function. This is especially common in people who eat poorly or drink heavily.
- Thyroid problems: Both underactive and overactive thyroid conditions can cause cognitive symptoms and personality changes.
- Electrolyte imbalances: Too much or too little sodium or calcium, or episodes of low blood sugar, can mimic dementia.
- Medication side effects: Some drugs, or combinations of drugs, cause confusion and memory problems that resolve once the medication is adjusted.
- Depression: In older adults, depression frequently shows up as forgetfulness, withdrawal, and difficulty concentrating, and it’s often mistaken for cognitive decline.
The critical difference is that these conditions improve with treatment. A doctor’s visit can rule them out with relatively simple tests, and the relief of finding a treatable cause is enormous.
Different Types Look Different
If it does turn out to be dementia, the specific symptoms your mom has can vary depending on the type. Alzheimer’s disease is the most common. It typically starts with memory loss and repetitive questions, then progresses to difficulty recognizing familiar people and impulsive behavior, and eventually affects the ability to communicate at all.
Lewy body dementia looks quite different. It tends to cause problems with focus and alertness (your mom might seem “zoned out” or unusually drowsy during the day), visual hallucinations, reduced facial expression, muscle stiffness, and sleep problems including insomnia or acting out dreams physically.
Vascular dementia, which results from reduced blood flow to the brain (often after strokes), can cause forgetfulness but also poor judgment, difficulty following instructions, and sometimes hallucinations. It tends to progress in noticeable steps rather than the gradual slide of Alzheimer’s.
A Simple Screening You Can Do at Home
If you want something more concrete than gut feeling, the Self-Administered Gerocognitive Exam (SAGE) is a validated screening tool developed at The Ohio State University Wexner Medical Center. It’s a four-page pen-and-paper test your mom can take at home in 10 to 15 minutes, with no time limit. It’s designed to catch mild cognitive impairment and early dementia, and its questions are intentionally harder than what a doctor might use in a quick office screen. It correctly identifies cognitive impairment about 79% of the time, with only a 5% false positive rate.
The SAGE test is free and available online. It’s not a diagnosis, but it gives you something concrete to bring to a doctor, and it can help clarify whether what you’re seeing is within the range of normal or worth investigating further.
How to Bring It Up With Your Mom
This is the part most people dread. The Alzheimer’s Association recommends having this conversation one-on-one rather than as a group, which can feel confrontational. Use specific observations rather than general accusations. Phrases like “I’ve noticed [specific change] in you, and I’m concerned. Have you noticed it?” or “You haven’t seemed like yourself lately” open the door without putting her on the defensive.
When suggesting a doctor’s visit, frame it around ruling things out rather than confirming a diagnosis: “There are lots of things that could be causing this, and dementia may or may not be one of them. Let’s see if the doctor can help us figure out what’s going on.” You can also appeal to shared peace of mind: “I think it would help us both to just check in with the doctor.”
Expect that the first conversation might not go well. She may get angry, dismissive, or scared. That’s normal. If it doesn’t land, make notes about what worked and what didn’t, then try again at a different time or in a different setting. This often takes more than one attempt.
What Happens at a Medical Evaluation
If your mom agrees to see a doctor, the evaluation is thorough but not invasive. It typically includes cognitive testing (memory, reasoning, language, and attention tasks), a neurological exam checking movement, balance, reflexes, and senses, and blood work to look for vitamin deficiencies, thyroid problems, and other treatable causes. A psychiatric evaluation may also be part of the process to check for depression or other mental health conditions that mimic dementia.
Brain imaging, usually a CT or MRI scan, checks for evidence of stroke, bleeding, tumors, or fluid buildup. In some cases, a PET scan can reveal specific protein deposits associated with Alzheimer’s disease. The full evaluation gives doctors a clear picture of whether dementia is present, what type it likely is, and whether any treatable factors are contributing.
Why Age Matters for Risk
Dementia risk climbs steeply with age. NIH-funded research estimates the lifetime risk of developing dementia after age 55 is about 42%, but most of that risk is concentrated late in life. By age 75, only about 4% of people have developed dementia. By 85, that rises to 20%, with the majority of cases occurring after 85. If your mom is in her 60s or early 70s, the changes you’re seeing are less likely to be dementia, which makes checking for treatable causes even more important. If she’s in her 80s or older, the probability is higher, but a medical evaluation is still essential because treatable conditions remain common at every age.