What’s the Difference?
Dementia is not one specific disease. It is an umbrella term for a group of symptoms involving problems with memory, thinking, judgment, language, or everyday functioning. It becomes dementia when those problems are serious enough to interfere with independent daily life.
Alzheimer’s disease is the most common cause of dementia. In other words, Alzheimer’s is a disease; dementia is the pattern of cognitive decline that the disease can cause.
Think of it this way: “dementia” is like saying someone has a fever—it describes a condition. Alzheimer’s is one possible cause of that condition. Other causes include vascular dementia, caused by strokes or reduced blood flow to the brain; Lewy body dementia; frontotemporal dementia; medication effects; depression; thyroid problems; and vitamin B12 deficiency.
Alzheimer’s usually begins gradually, often with difficulty learning and retaining new information. Over time, it may affect language, orientation, personality, and the ability to manage daily tasks.
Not every memory lapse is dementia, and not every dementia case is Alzheimer’s. Because some causes can be treated or improved, new or worsening memory and thinking problems deserve a medical evaluation early.
