Editor’s Note
This article was originally published in 2024 and was completely updated and expanded in July 2026 with current information, additional resources, and practical guidance for family caregivers.
Most people think dementia simply means memory loss.
But dementia is actually an umbrella term for many different brain diseases. While Alzheimer’s disease is the most common, it’s only one of many types.
Each type affects the brain differently. Some people struggle mostly with memory, while others experience hallucinations, personality changes, movement problems, or sudden mood swings.
Knowing which type of dementia your loved one has won’t change the diagnosis—but it can completely change how you understand their symptoms and respond as a caregiver.
The more you understand the disease, the more confidence, patience, and compassion you’ll have on this journey.
💜 “Understanding the type of dementia won’t change the diagnosis—but it can completely change how you care.”
A Story Most Caregivers Can Relate To
Linda was caring for her husband, Tom, who had recently been diagnosed with “dementia.” The doctor never specified which kind.
At first, Tom was just forgetful. But soon he began seeing people who weren’t there, talking to “visitors,” and insisting strangers were in their home at night.
Linda became frustrated and scared.
She thought he was joking, lying, or trying to get attention.
One night, she snapped — “There’s no one here! Stop it!” — and then cried alone in the bathroom, feeling guilty and overwhelmed.
Later, she learned he had Lewy Body Dementia, which often causes visual hallucinations and sleep disturbances.
Suddenly, everything made sense.
He wasn’t being difficult. He was frightened.
Once Linda understood why Tom was seeing people who weren’t there, she stopped arguing with him and started reassuring him instead.
That’s the power of understanding the type of dementia.
Why Knowing the Type of Dementia Matters
Many caregivers are told their loved one has “dementia,” but dementia is actually an umbrella term—not a specific disease.
Knowing the type of dementia can help explain why your loved one behaves the way they do, what symptoms you may see, and what changes to expect over time. It can also help you ask better questions and prepare for future care decisions.
If you’re unsure of the difference between Alzheimer’s and other dementias, you can start with this helpful breakdown:
💜 “The more you understand the disease, the less likely you are to blame the person living with it.”
Another Real-Life Example of Why Dementia Type Matters
Mary was caring for her 78-year-old father, George, who had recently suffered a small stroke. Physically, he recovered well — he could walk, talk, and do most daily tasks with help.
But then something strange happened.
George began bursting into tears for no reason.
He’d cry during breakfast.
Cry while watching TV.
Cry the moment Mary walked into the room.
At first, Mary assumed he must be sad or depressed, so she kept asking:
“Dad, what’s wrong? What are you thinking about?”
But every time, George looked just as confused and said:
“I don’t know why I’m crying.”
His neurologist later explained this was a common symptom of Vascular Dementia — caused not by sadness, but by brain changes that affect emotional control.
Once Mary understood that, she stopped trying to “fix the feeling” and simply offered comfort.
Understanding the type changed everything about how she responded.
You can learn more behavior patterns like this in my article:
👉 Top 10 Dementia Behaviors Every Caregiver Should Know About
What Is Dementia? (Explained Simply)
Think of dementia like cancer.
“Cancer” is the broad word — but there are many kinds: lung cancer, breast cancer, skin cancer. Each one acts differently.
Dementia works the same way.
Dementia is a general term describing changes in thinking, memory, behavior, and daily function.
But there are different types — and each one affects the brain in different ways.
The infographic below shows why dementia is considered an umbrella term and introduces the most common types of dementia caregivers may encounter.
Dementia Types at a Glance
| Dementia Type | Common Early Symptoms |
|---|---|
| Alzheimer’s Disease | Memory loss, repeating questions, getting lost |
| Vascular Dementia | Sudden confusion, poor judgment, emotional changes |
| Lewy Body Dementia | Hallucinations, sleep disturbances, Parkinson-like symptoms |
| Frontotemporal Dementia | Personality changes, impulsive behavior, language problems |
| Parkinson’s Disease Dementia | Movement problems followed by thinking changes |
| Mixed Dementia | A combination of symptoms from two or more types |
A Quick Look at Each Type
Alzheimer’s Disease
Alzheimer’s disease is the most common type of dementia, accounting for about 60% to 80% of all dementia cases. It usually begins with gradual memory loss, such as forgetting recent conversations, repeating questions, or misplacing everyday items. As the disease progresses, your loved one may have trouble recognizing familiar people, solving problems, making decisions, and completing daily tasks that once seemed simple.
Vascular Dementia
Vascular dementia is caused by reduced blood flow to the brain, often after one or more strokes or other conditions that damage blood vessels. Unlike Alzheimer’s disease, symptoms may appear suddenly or worsen in noticeable “steps” instead of gradually. Caregivers often notice problems with planning, judgment, concentration, mood changes, or emotional outbursts such as crying or anger that seem to happen without warning.
Lewy Body Dementia
Lewy body dementia affects thinking, movement, sleep, and behavior, making it one of the more challenging types of dementia to recognize. Visual hallucinations, acting out dreams during sleep, and periods of confusion followed by moments of remarkable clarity are common early signs. Because it shares symptoms with both Alzheimer’s disease and Parkinson’s disease, it is sometimes mistaken for one of those conditions before the correct diagnosis is made.
Frontotemporal Dementia (FTD)
Frontotemporal dementia primarily affects the areas of the brain responsible for behavior, personality, and language. Unlike Alzheimer’s disease, memory may remain fairly normal during the early stages, while changes in behavior become much more noticeable. Caregivers may see inappropriate comments, impulsive decisions, loss of empathy, or difficulty speaking and understanding language long before memory problems develop.
Parkinson’s Disease Dementia
Parkinson’s disease dementia develops in some people after living with Parkinson’s disease for several years. Movement problems such as tremors, stiffness, and slow walking usually appear first, followed later by changes in memory, thinking, and decision-making. Caregivers may also notice slower responses, confusion, depression, anxiety, or visual hallucinations as the disease progresses.
Mixed Dementia
Mixed dementia means a person has changes in the brain caused by two or more types of dementia at the same time. The most common combination is Alzheimer’s disease and vascular dementia, although other combinations can occur. Because multiple diseases are affecting the brain, symptoms can vary widely from person to person, making diagnosis and caregiving more complex.
While these are the most common types of dementia, no two people experience the disease in exactly the same way. Even individuals with the same diagnosis can have different symptoms, progress at different rates, and require different caregiving approaches.
💜 “Every dementia is different because every brain is different.”
Dementia Is More Than Memory Loss
Different dementias may include:
🧠 Cognitive Changes
- Forgetfulness
- Poor judgment
- Difficulty planning or solving problems
🎭 Psychological & Emotional Changes
- Depression
- Anxiety
- Anger or paranoia
- Hallucinations or delusions
🚶 Behavioral Changes
- Wandering
- Pacing
- Restlessness
- Sundowning
🏃 Physical & Motor Changes
- Balance issues
- Stiffness or shaking
- Swallowing trouble
- Incontinence
Can Someone Have More Than One Type of Dementia?
Yes.
In fact, many older adults have more than one type of dementia. This is called Mixed Dementia, and it’s much more common than many people realize.
Someone may have Alzheimer’s disease along with vascular changes caused by strokes or reduced blood flow to the brain.
That’s one reason why no two people with dementia look exactly alike.
If You Don’t Know Which Type Your Loved One Has
Many caregivers don’t.
Start by asking:
- What type of dementia do they have?
- What stage are they in?
- What symptoms should we expect next?
- Are there medications specific to this type?
- What resources do you recommend?
Even if the exact diagnosis isn’t clear, learning about dementia can help you respond with more confidence.
How Dementia Is Diagnosed
Doctors may use:
- CT scans, MRIs, or PET scans
- Blood tests to rule out other causes
- Memory and behavior assessments
But here’s the truth:
Family observations are often the most valuable diagnostic tool doctors have.
How Families Help Doctors Diagnose
Caregivers are the real detectives.
By tracking daily changes — memory shifts, mood swings, movement issues — doctors can better determine which dementia type is present.
👉 That’s why I created the Alzlog app — to help caregivers track symptoms easily, determine dementia stage, and share organized reports with doctors.
It removes guesswork and gives your loved one better care faster.
💜”Knowledge turns confusion into confidence and fear into understanding.”
New to dementia caregiving?
If you’re feeling overwhelmed by all the new information, my Understanding Dementia: A Beginner’s Course walks you through the basics, including the different types of dementia, the stages, common behaviors, communication tips, and what to expect as the disease progresses.
Frequently Asked Questions About Dementia Types
❓ Is Alzheimer's disease the same as dementia?
No. Dementia is a general term for a group of symptoms that affect memory, thinking, and daily functioning. Alzheimer’s disease is the most common type of dementia, but there are many others, including vascular dementia, Lewy body dementia, and frontotemporal dementia.
❓ Can someone have more than one type of dementia?
Yes. Many older adults have mixed dementia, meaning they have changes from two or more types of dementia. The most common combination is Alzheimer’s disease and vascular dementia.
❓ Why is it important to know the type of dementia?
Knowing the type of dementia helps explain why certain symptoms occur, what changes to expect, and which treatments or care strategies may be most helpful. It also helps caregivers better understand their loved one’s behaviors instead of assuming they are being difficult.
❓ Can doctors always tell which type of dementia someone has?
Not always. Some types are easier to diagnose than others, and symptoms often overlap. Doctors use medical history, brain imaging, memory testing, physical exams, and caregiver observations to make the most accurate diagnosis possible.
❓ What if my loved one was only told they have "dementia"?
This is very common. Ask the healthcare provider whether a specific type of dementia has been identified or if additional testing is recommended. Even when the exact diagnosis isn’t certain, learning about dementia can help you better prepare for the future.
❓ Do all types of dementia cause memory loss first?
No. While Alzheimer’s disease often begins with memory problems, other dementias may start with changes in behavior, language, movement, or visual hallucinations. That’s one reason an accurate diagnosis is so important.
❓ Can the type of dementia change over time?
The underlying disease usually doesn’t change, but symptoms become more noticeable as dementia progresses. In some cases, additional brain changes occur, leading to a diagnosis of mixed dementia.
❓ Which type of dementia is most common?
Alzheimer’s disease is the most common type, accounting for approximately 60% to 80% of dementia cases. Vascular dementia, Lewy body dementia, frontotemporal dementia, and mixed dementia are also common causes.
Dementia Caregiver Resource Center
If you’re caring for someone with dementia, these articles may also help:
💜”When you stop asking ‘Why are they doing this?’ and start asking ‘What is their brain experiencing?’ everything begins to change.”
When You Understand Dementia, You Develop More Patience
Knowledge doesn’t erase the hard days — but it does change how they feel.
When you finally understand why your loved one is acting the way they are — whether they’re crying for no reason, seeing people who aren’t there, pacing nonstop, or refusing help — you stop asking “Why are they doing this to me?” and start recognizing…
👉 “This isn’t them being difficult — this is their brain changing.”
That shift right there?
That’s where patience is born.
That’s where guilt begins to lift.
That’s where peace replaces panic.
Because:
-
You stop taking things personally.
-
You stop trying to force logic where there isn’t any.
-
You stop fighting the disease — and start working with it.
You don’t have to know everything.
You don’t have to be the perfect caregiver.
You just have to understand what you’re dealing with — and take one step at a time from there.
And once you do…
💫 The road ahead becomes a little less scary.
💫 Your reactions become softer.
💫 Your confidence grows — even when the future is uncertain.
💜 You’ve got this. And I’m here to guide you every step of the way.
If you ever feel lost — come back to this article, open the cheat sheet, or explore the Understanding Dementia Course.
You’re not walking this journey alone — I’m walking it with you.
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