Dementia

Also called Memory loss or Cognitive decline

Dementia is a general term for a group of symptoms, including memory loss and problems with thinking, language and everyday tasks, that get worse over time. It is caused by diseases that damage the brain, most often Alzheimer's disease and vascular dementia. It is not a normal part of ageing.

Last updated Nov 9, 2026

What it is

A diagnosis helps people get treatment, support and time to plan ahead. Some causes of memory problems, such as low vitamin B12, thyroid problems or depression, are treatable, so they are checked first.

Medicines can help some symptoms in some types. Support for the person and their carers, staying active and social, and planning ahead are all important.

Common signs

  • Memory loss, especially for recent events
  • Difficulty concentrating or planning
  • Confusion about time or place
  • Problems finding the right words
  • Changes in mood and behaviour

How it is usually diagnosed

  • Memory and thinking tests
  • Blood tests to rule out other causes
  • Brain scans (CT or MRI)
  • Assessment at a memory clinic

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Memory test scores over time
  • Brain scan reports
  • Memory clinic letters
  • Lasting power of attorney and advance care plans
  • A list of medicines

Questions to ask your doctor

  • What type of dementia is it?
  • Are there medicines that could help?
  • What support is available for us at home?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Sudden confusion that comes on over hours or days, which may be delirium from an infection or other illness
  • A fall with a head injury

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

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