Dementia is a word used to describe a group of symptoms including memory loss, confusion, mood changes and difficulty with day-to-day tasks.

There are many causes of dementia, with Alzheimer's disease the most common.

These pages provide specific information about common causes of dementia, along with more general information. It does not replace any advice given by doctors, nurses or pharmacists, but aims to give background information which we hope you find helpful.

A quick guide to dementia

Dementia is not something that just happens to everyone as they get older. It is caused by different illnesses.

Types of dementia

Dementia is not a disease in itself. Dementia is a word used to describe a group of symptoms that occur when brain cells stop working properly.

Support for people affected by dementia

There is support for everyone affected by dementia, including carers.

Reducing your risk of dementia

Alzheimer’s and other dementias are complex diseases. We are making considerable progress in understanding how they develop and it’s clear that they don’t have one single cause.

Genes and dementia

We are often asked about the genetics of dementia – whether diseases like Alzheimer’s can be inherited, or passed down through families.

How dementia affects everyday life

Dementia is caused by diseases that damage the brain and affect a person’s ability to think, remember and go about their day-to-day life.

For children and young people

Our website ‘Dementia Explained’ helps children and teenagers understand dementia, how it affects someone and how this could impact their lives.

Dementia Statistics Hub

The place to go for statistical information about dementia, dementia research and Alzheimer’s Research UK.

Need to know more?

You might have general questions about the diagnosis or symptoms of dementia. Perhaps you’re interested in the treatments currently available, or the risk factors for developing the condition. You will find the answers in these pages.