What is dementia?

It's normal for your memory to be affected by stress, tiredness, certain illnesses and medicines, but if you're becoming increasingly forgetful, particularly if you're over the age of 65, it's a good idea to talk to a GP about the early signs of dementia.

Memory loss (amnesia) can be annoying if it happens occasionally, but if it's affecting your daily life, or it's worrying you, or someone you know, you should get help from a GP.

Dementia is not only about memory loss. It can also affect the way you speak, think, feel and behave.

It's also important to remember that dementia is not a natural part of ageing.

Dementia is a syndrome (a group of related symptoms) associated with an ongoing decline of brain functioning. There are many different causes of dementia, and many different types.

People often get confused about the difference between Alzheimer's disease and dementia. Alzheimer's disease is a type of dementia and, together with vascular dementia, makes up the majority of cases.

Symptoms of dementia

Dementia symptoms may include problems with:

  • memory loss
  • thinking speed
  • mental sharpness and quickness
  • language, such as using words incorrectly, or trouble speaking
  • understanding
  • judgement
  • mood
  • movement
  • difficulties doing daily activities

People with dementia can lose interest in their usual activities and may have problems managing their behaviour or emotions. They may also find social situations difficult and lose interest in relationships and socialising.

Aspects of their personality may change, and they may lose empathy (understanding and compassion).

A person with dementia may see or hear things that other people do not (hallucinations and hearing voices).

Because people with dementia may lose the ability to remember events, or not fully understand their environment or situations, it can seem as if they're not telling the truth or are wilfully ignoring problems.

As dementia affects a person's mental abilities, they may find planning and organising difficult. Maintaining independence may also become a problem.

A person with dementia will usually need help from friends or relatives, including help with making decisions.

The symptoms of dementia usually become worse over time. In the late stage of dementia, people will not be able to take care of themselves and may lose their ability to communicate.

Read more about the symptoms of dementia.