Dementia can significantly affect an individual's emotions and behaviours, causing changes that might range from subtle to dramatic.

These alterations can be confusing and upsetting for both the person diagnosed with dementia and their loved ones. It is essential to recognise that these changes are not deliberate.

Common Causes of Behavior Changes in Dementia

Mood and behaviour changes in dementia can arise from various factors, including:

Physical Changes in the Brain: Dementia affects brain function, leading to alterations in behaviour and mood.

Communication Difficulties: Individuals may struggle to express their thoughts and feelings, leading to frustration.

Environmental Factors: Changes in surroundings—like noise levels, lighting, or crowded spaces—can overwhelm someone with dementia.

Cognitive Changes: Declines in vision, hearing, or thinking abilities can make ordinary tasks daunting.

Health Issues: Illness or medication side effects may contribute to mood fluctuations.

Physical Discomfort: Basic needs like hunger, fatigue, or restroom needs can affect behaviour.

Unmet Emotional Needs: A lack of social interaction or personal connection can lead to mood 

swings.

Types of Mood and Behavior Changes

Dementia manifests differently in each individual, but common changes include:

1. Restlessness: Many people with dementia experience confusion and restlessness, particularly in the afternoon.

2. Depression: Depression is prevalent among those with dementia, necessitating attention and intervention.

3. Anxiety: Increased anxiety may occur, often requiring supportive techniques to manage.

4. Disinhibition: This can lead to misbehaviour, requiring caregivers to understand how to handle such situations.

5. Agitation and Aggression: Some individuals may display agitation or aggressive behaviour, needing strategies for de-escalation.

6. Sleep Disturbances: Problems with sleep are common; recognising this helps improve nightly rest.

7. Delirium: Severe confusion or delirium can indicate an underlying health issue.

8. Hallucinations and Delusions: Awareness of these experiences can assist in providing the proper support.

9. Shadowing Behaviour: Constantly following caregivers can be distressing but is often associated with dementia.

10. Wandering: Many people with dementia may wander, posing safety risks and requiring preventative measures.

What can you do?

If you notice changes in the "good "or" behaviour of someone close to you with dementia, it can help to start keeping a diary or log of what's happening. This can help you better understand what's triggering these changes and what works to help them.

Make a note of:

  • What precisely happened: how they changed, what they did or said.

  • when it happened

  • who was involved

  • what was happening around them before

  • who was affected

  • how you and other people responded, and whether it helped.

Review the events you've listed regularly to find patterns, causes, and valuable strategies to help. You can also show your diary to your doctor or specialist for advice.

Help with changed mood and behaviour.

If changes in the mood or behaviour of someone close to you with dementia are causing them or you distress, rest assured, there is help available:

You're not alone

We support customers and families living with dementia every day with a specialised dementia support plan that adapts to the progressive nature of dementia.

Contact your local Just Better Care to talk about how we can support you at home with specialised dementia support services


Get started with dementia support