Article
Dementia vs. Alzheimer's: What's the Difference?
A plain-English explanation of how dementia and Alzheimer's disease are related — and why the distinction matters for families.
Quick answer
Dementia is an umbrella term for symptoms affecting memory and thinking. Alzheimer's is the most common disease that causes dementia, but not the only one.
Many families use the words "dementia" and "Alzheimer's" as if they mean the same thing. They don't.
Dementia is an umbrella term
Dementia describes a set of symptoms — memory loss, trouble thinking clearly, changes in mood or behavior — that interfere with daily life. It is not a single disease.
Alzheimer's is the most common cause of dementia
Alzheimer's disease causes about 60–80% of dementia cases. Other causes include vascular dementia, Lewy body dementia, and frontotemporal dementia.
Why this matters for families
The specific cause changes how doctors approach treatment and what to expect over time. It also affects which benefits and programs a family may qualify for.
Next steps
Talk to the primary doctor about a memory evaluation, gather a written list of symptoms and when they began, and call the Alzheimer's Association helpline at 1-800-272-3900 for free guidance.