Types of dementia

Lesley Dobson

There are over 100 different types of dementia but most cases are caused by around 10 of the most common conditions and diseases. Find out more.



Dementia is the overall term that covers a range of conditions that cause brain disease.

There are a large number of different causes of dementia – the Alzheimer’s Society says there are over 100 different types – however, the vast majority of cases are caused by around 10 of the most common conditions and diseases.

What should I do if I think I have dementia?

If you are concerned that you, (or someone close to you,) may have dementia, it’s important to see your GP and tell them what symptoms you’re having.

What happens during tests for dementia?

Your GP may refer you to a specialist clinic, where they may ask you some questions about your general health, and the symptoms you’ve been having. They may also ask you to do some tests – for instance, memory and language tests.

You may be asked to go back for repeat tests, possibly every six to 12 months, to check whether your symptoms have changed in that time. The staff at the clinic may ask you to have a brain scan, and maybe blood tests as well.

If you are diagnosed with dementia, it can be a shock, and is likely to cause a lot of worry for you and those closest to you. However you don’t have to go through this alone.

Understanding what symptoms, treatment – and help - is available, can make things a little easier for you and your family.

In this section on dementia, we have clear information on the main types of dementia, their symptoms, and the treatment available. Click to read about the condition that most interests you.

The main types of dementia

Drugs and treatments for dementia

The opinions expressed are those of the author and are not held by Saga unless specifically stated.

The material is for general information only and does not constitute investment, tax, legal, medical or other form of advice. You should not rely on this information to make (or refrain from making) any decisions. Always obtain independent, professional advice for your own particular situation.