In short
Worry less about occasional forgetfulness and more about changes that disrupt daily life: memory loss that interferes with normal tasks, trouble with familiar activities, confusion about time or place, poor judgment, new word-finding problems, and misplacing things without being able to retrace steps. Having several of these signs doesn't mean it's Alzheimer's—but it does mean your parent should see a doctor, because some causes are reversible.
Normal aging or something more?
Brains change with age, the way knees and eyesight do. Occasional forgetfulness is normal and is not a sign of disease. The federal National Institute on Aging draws the line this way:
| Age-related forgetfulness | Signs of dementia |
|---|---|
| Losing things from time to time | Misplacing things often and being unable to find them |
| Sometimes forgetting which word to use | Trouble having a conversation |
| Forgetting which day it is and remembering later | Losing track of the date or time of year |
| Missing a monthly payment | Problems taking care of monthly bills |
| Making a bad decision once in a while | Making poor judgments and decisions a lot of the time |
The pattern to notice isn't forgetting—everyone forgets. It's whether the change is persistent and whether it's interfering with daily life.
The warning signs
The U.S. Centers for Disease Control and Prevention publishes ten warning signs. A parent with one or more of them should see a doctor to find the cause:
- Memory loss that disrupts daily life.
- Challenges in planning or solving problems.
- Difficulty completing familiar tasks at home, at work, or at leisure.
- Confusion with time or place.
- Trouble understanding visual images and spatial relationships.
- New problems with words in speaking or writing.
- Misplacing things and not being able to retrace steps.
- Decreased or poor judgment.
- Withdrawal from work or social activities.
- Changes in mood or personality.
Watching for signs and not sure what's next?
Tell us what's changed and we'll help you plan the doctor's visit—and start thinking about safety and care, calmly, before anything is urgent.
What it might be instead
This is why the doctor's visit matters so much. A number of conditions can mimic dementia and are treatable or reversible, including medication side effects or interactions, depression, thyroid problems, vitamin deficiencies, infections such as a urinary tract infection, and sleep problems. The CDC notes that early diagnosis gives a person a chance to identify the cause of the changes, which could be reversible. If it is Alzheimer's or another dementia, starting treatment earlier is when it helps most.
How to get a real evaluation
- Write down what you've seen, with dates. "Couldn't find the way home from church on the 3rd." "Paid the same bill twice in April." Your notes are more useful to a doctor than a general impression.
- Go to the appointment with your parent, or send the notes ahead. A parent may minimize symptoms in the room, or the doctor may not ask the right questions without your observations.
- Ask for a cognitive assessment. Doctors can ask about health, run cognitive tests, and order standard medical tests to work out the cause. If needed, they may refer your parent to a specialist such as a neurologist.
- Ask what's being ruled out. Medications, thyroid, vitamin levels, depression, and infection are the usual treatable suspects.
The National Institute on Aging's ADEAR Center, 800-438-4380, offers free information for families about diagnosis, treatment, and care.
What to do while you wait
You don't need a diagnosis to do the things that will help either way, and it's far easier to do them while your parent is well enough to be part of the decisions:
- Get the legal paperwork done early. A durable power of attorney, a health care directive, and a HIPAA release. Do this while it's calm and everyone can agree—not after a crisis.
- Make the home safer. Remove trip hazards, improve lighting, and consider a medical alert button. If driving is a question, raise it with the doctor rather than policing it yourself.
- Learn about local support. The Alzheimer's Association runs a free 24/7 helpline, 1-800-272-3900, and the Eldercare Locator, 1-800-677-1116, finds programs in your parent's area.
Questions families ask
Is forgetting normal with age, or is it dementia?
Occasional forgetfulness is normal. What matters is whether it disrupts daily life and is getting worse. Misplacing things sometimes is normal; misplacing them often and being unable to find them, or losing track of the year, is a reason to see a doctor.
My father has the signs but insists nothing is wrong. What do I do?
You often can't win that argument with evidence, and trying can make it worse. Shift from persuading to arranging: get a medical evaluation, use his doctor's authority rather than yours, and frame it around a checkup rather than memory. If he still refuses and memory loss is affecting safety, an elder law attorney can explain your options.
Can dementia be reversed?
Most dementias, including Alzheimer's, cannot be reversed—but some causes of memory and thinking changes can be treated or reversed, such as medication side effects, thyroid problems, vitamin deficiencies, depression, and infections. That's exactly why a proper evaluation matters instead of assuming the worst.
What's the difference between dementia and Alzheimer's?
Dementia is an umbrella term for changes in thinking, memory, and reasoning severe enough to interfere with daily life. Alzheimer's is the most common disease that causes it. There are several other types. Only a clinician can work out which, if any, applies.
Where can I get support as a caregiver?
The Alzheimer's Association's 24/7 helpline, 1-800-272-3900, offers guidance and local support groups. Your Area Agency on Aging—reached through the Eldercare Locator, 1-800-677-1116—can connect you to respite care and caregiver programs in your area.
Sources: National Institute on Aging, "Age-Related Forgetfulness or Signs of Dementia?" (nia.nih.gov); National Institute on Aging, "What Are the Signs of Alzheimer's Disease?" (nia.nih.gov); U.S. Centers for Disease Control and Prevention, "Signs and Symptoms of Alzheimer's" (cdc.gov). Retrieved October 8, 2026.