Many people wonder whether dementia and Alzheimer’s disease are the same thing. The terms are closely connected, but they describe different things.
A simple way to understand the difference between Alzheimer’s and dementia is to think of dementia as a description of changes in cognitive abilities, while Alzheimer’s disease is a specific disease that can cause those changes.
This guide explains the difference between Alzheimer’s and dementia, the different conditions that can cause dementia, and why understanding a diagnosis can help families find the right information and support.
Alzheimer’s vs dementia: the short answer
Alzheimer’s and dementia are closely linked, but they are not two names for the same condition.
Dementia is a broad term used to describe changes in memory, thinking and other mental abilities that affect everyday life.
Alzheimer’s disease is a specific disease of the brain and the most common cause of dementia.
This means that:
- Alzheimer’s disease can cause dementia.
- A person can have dementia without having Alzheimer’s disease.
- There are several different diseases and conditions that can cause dementia.
What is Dementia?
Dementia describes changes in cognitive abilities that are significant enough to affect a person’s everyday life.
The changes associated with dementia can look very different from one person to another. Someone may experience memory problems, while another person may have greater difficulties with communication, concentration, reasoning, behaviour or managing familiar activities.
Dementia is not one single disease. Different conditions can cause dementia, and the changes a person experiences will depend partly on the underlying cause and the areas of the brain affected. For a more detailed explanation of dementia, including its symptoms, causes and how it can affect everyday life, see our guide: What Is Dementia? A Simple Guide for Families
What is Alzheimer’s Disease?
Alzheimer’s disease is a specific disease that affects the brain. It is the most common cause of dementia.
Alzheimer’s usually develops gradually, and changes may become more noticeable as the disease progresses. The disease affects how brain cells work and communicate, which can lead to difficulties with memory, thinking, reasoning, language and everyday activities.
Problems remembering recent events or new information are often among the earlier signs, although Alzheimer’s does not affect everyone in the same way.
Memory problems do not necessarily mean that someone has Alzheimer’s disease. There can be many possible reasons for changes in memory or thinking, which is why an assessment by a healthcare professional is important.
Can someone have dementia without Alzheimer’s?
Yes. Alzheimer’s disease is the most common cause of dementia, but other diseases and conditions can cause dementia too.
These include:
- Vascular dementia, which is linked to problems with the blood supply to the brain.
- Dementia with Lewy bodies, which can affect attention, movement, perception and thinking.
- Frontotemporal dementia, which can cause changes in behaviour, personality, language and communication.
- Mixed dementia, where more than one disease is contributing to a person’s symptoms, such as Alzheimer’s disease and vascular dementia.
So, a diagnosis of dementia does not automatically mean that someone has Alzheimer’s disease. Knowing the underlying cause can help families and healthcare professionals understand what the person is experiencing and consider what support may be most helpful.
Why Does the Difference Matter?
Knowing whether someone has Alzheimer’s disease or another form of dementia can help families understand the changes they are seeing and find information that is relevant to their situation.
Different conditions can affect the brain in different ways, so a person’s symptoms, abilities and support needs may vary.
However, a diagnosis does not tell the whole story.
Two people with the same diagnosis can have very different personalities, interests, abilities, routines and care needs. Their experience of dementia will also be shaped by their health, relationships, environment and stage of the condition.
For families, understanding the diagnosis is important. But understanding the person is just as important.
When Should You Seek Advice
If you notice ongoing changes in someone’s memory, thinking, communication, behaviour or ability to manage everyday activities, it is a good idea to speak to their GP.
There can be many reasons for these changes, and an assessment can help establish what may be causing them.
Seeking advice can also help families understand what support is available and make plans that reflect the person’s wishes, independence and wellbeing.
How Westgate Healthcare can help
At Westgate Healthcare, we provide personalised dementia care focused on dignity, comfort, independence and meaningful daily life.
Getting to know each person is an important part of our approach. We learn about their life story, preferences, routines, interests and the relationships that matter to them. This helps our teams provide care around the person, rather than allowing their diagnosis to define the support they receive.
Whether someone is living with Alzheimer’s disease or another type of dementia, we want them to feel safe, understood and supported in their daily life.
There is no one-size-fits-all approach to dementia care. By understanding both the condition and the individual, we can support each person to maintain meaningful routines, relationships and experiences for as long as possible.
FAQs
Is dementia the same as Alzheimer’s?
No. Dementia is an umbrella term used to describe changes in memory, thinking, communication and other cognitive abilities that affect everyday life. Alzheimer’s disease is a specific brain disease that can cause dementia.
What is the difference between Alzheimer’s and dementia?
The main difference between Alzheimer’s and dementia is that dementia describes the effects on a person’s cognitive abilities, while Alzheimer’s disease is one possible underlying cause. Alzheimer’s is the most common cause of dementia.
Can you have dementia without Alzheimer’s?
Yes. Not everyone with dementia has Alzheimer’s disease. Other conditions can cause dementia, including vascular dementia, dementia with Lewy bodies, frontotemporal dementia and mixed dementia.
Is Alzheimer’s a type of dementia?
Alzheimer’s disease can cause dementia, but the two terms are not interchangeable. Dementia describes the changes in cognitive abilities that affect everyday life, while Alzheimer’s disease is the underlying brain disease in this case.
Further Support and Information
If you would like to learn more about dementia, the following organisations provide trusted information, advice and support for people living with dementia and their families:
Alzheimer’s Society – Information about dementia, types of dementia, support services and advice for families.
Dementia UK – Specialist dementia support and guidance, including support from Admiral Nurses.
NHS – Information about dementia symptoms, diagnosis, treatment and accessing support.