Dementia is a broad term used to describe a range of progressive neurological conditions that affect memory, thinking and behaviour. It is not a single disease, but a collection of symptoms caused by damage to the brain. If you’re concerned about a loved one or beginning to explore care options, understanding dementia is an important first step.

What does dementia mean?

Dementia refers to a decline in cognitive function that is severe enough to impact daily life. This can include difficulties with:

• Memory
• Communication and language
• Problem-solving and decision-making
• Mood and behaviour

Dementia is progressive, meaning symptoms typically worsen over time. However, the way it develops and the speed of progression can vary significantly from person to person.

What causes dementia?

Dementia occurs when brain cells are damaged by disease. This damage interferes with how brain cells communicate, affecting thinking, memory and behaviour.

One of the most common causes is Alzheimer’s disease, which accounts for the majority of dementia cases. While it cannot currently be prevented, certain risk factors such as increasing age can make it more likely to develop.

Types of dementia

There are many different types of dementia, and some people may be diagnosed with more than one type (known as mixed dementia).

Alzheimer’s disease

The most common form of dementia, often associated with memory loss and gradual cognitive decline.

Vascular dementia

The second most common type, Vascular dementia is caused by reduced blood flow to the brain, often following strokes or small vessel disease. It is commonly linked to conditions such as high blood pressure, heart disease, high cholesterol and diabetes. Managing these conditions may help slow its progression.

Other types of dementia

Less common forms include:

• Parkinson’s disease dementia
• Huntington’s disease
• Frontotemporal dementia
• Creutzfeldt-Jakob disease

Each type affects the brain differently, which means symptoms and progression can vary.

Does everyone experience dementia in the same way?

No, dementia affects everyone differently.

Even when people have the same diagnosis, their symptoms, progression and personal experience can vary widely. Factors such as overall health, lifestyle, support networks and the specific area of the brain affected all play a role.

This is why personalised, compassionate care is so important.

When to seek support

If you’ve noticed changes in memory, behaviour or communication in yourself or a loved one, it’s important to seek advice from a GP. Early diagnosis can:

• Help access the right support and treatment
• Allow time to plan for the future
• Improve quality of life

Supporting someone living with dementia

Living with dementia can feel overwhelming, both for the individual and their family. The right support whether at home or in a care setting can make a significant difference.

High-quality dementia care focuses on the person, not just the condition, helping individuals maintain independence, dignity and a sense of identity for as long as possible.