What Is the Difference Between Dementia and Alzheimer’s?
An estimated 7.4 million Americans age 65 and older are living with Alzheimer’s disease in 2026, according to the Alzheimer’s Association. About 1 in 9 people age 65 and older has Alzheimer’s, making it a condition that affects millions of individuals, caregivers, and families across the country.
Yet one of the most common questions families have is surprisingly simple:
What is the difference between dementia and Alzheimer’s?
The terms are often used interchangeably, but they do not mean exactly the same thing. The simplest explanation is that dementia is a general term for a group of symptoms, while Alzheimer’s disease is a specific disease and the most common cause of dementia.
Understanding the difference can make medical conversations, caregiving decisions, and planning for the future a little easier.
Key Takeaways
Dementia is not one specific disease. It is an umbrella term describing problems with memory, thinking, reasoning, or decision-making that interfere with everyday life.
Alzheimer’s disease is a specific brain disease and the most common type of dementia.
According to the CDC, Alzheimer’s accounts for approximately 60% to 80% of dementia cases.
Other forms of dementia include vascular dementia, Lewy body dementia, and frontotemporal dementia.
A person can have dementia without having Alzheimer’s disease, but a person with Alzheimer’s disease will develop dementia symptoms as the disease progresses.
Dementia is not a normal part of aging, even though the risk of developing dementia increases with age.
Changes in memory or thinking should be evaluated by a healthcare professional because several different conditions can cause cognitive symptoms.
What Is Dementia?
Dementia is an overall term used to describe a decline in memory, thinking, reasoning, communication, or other cognitive abilities that becomes significant enough to interfere with a person's daily life.
According to the Centers for Disease Control and Prevention (CDC), dementia is not a specific disease. Instead, several diseases and conditions can cause dementia.
Someone living with dementia may experience difficulty with:
Remembering recent information
Making decisions
Solving problems
Communicating
Managing medications or finances
Completing familiar activities
Understanding time or place
Maintaining judgment
Recognizing people or objects
Managing changes in mood or behavior
The symptoms can look different depending on the underlying cause and the areas of the brain that are affected.
Understanding the Difference Between Dementia and Alzheimer’s
One way to understand the difference between dementia and Alzheimer’s is to think of dementia as an umbrella.
Under that umbrella are several diseases that can cause dementia symptoms.
These include:
Alzheimer’s disease – The most common cause of dementia.
Vascular dementia – Dementia caused by conditions that affect blood flow to the brain, often associated with strokes or other vascular problems.
Lewy body dementia – A progressive form of dementia associated with abnormal deposits of a protein called alpha-synuclein in the brain.
Frontotemporal dementia – A group of disorders involving changes in the frontal and temporal areas of the brain, which can significantly affect personality, behavior, communication, and language.
Mixed dementia – When changes associated with more than one type of dementia are present at the same time.
This is why hearing that someone "has dementia" does not necessarily tell you the disease causing it.
What Is Alzheimer’s Disease?
Alzheimer’s disease is a progressive brain disorder and the most common cause of dementia.
The CDC describes Alzheimer’s as a progressive and irreversible disease caused by damage to nerve cells in the brain.
Symptoms often begin gradually and worsen over time.
Early Alzheimer’s may involve problems such as:
Forgetting recently learned information
Repeating questions
Losing track of appointments
Misplacing belongings
Having difficulty managing bills or finances
Becoming confused in familiar places
Struggling to find the right words
As Alzheimer’s advances, the disease can eventually affect communication, mobility, eating, swallowing, personal care, and the ability to interact with the surrounding environment.
Dementia vs. Alzheimer’s: What Is the Main Difference?
The most important distinction is this:
Dementia describes a collection of symptoms. Alzheimer’s is a specific disease that can cause those symptoms.
Another way to put it is:
All Alzheimer’s disease involves dementia, but not all dementia is caused by Alzheimer’s disease.
For example, someone experiencing significant cognitive decline after multiple strokes may be diagnosed with vascular dementia rather than Alzheimer’s disease.
Someone else may have symptoms caused by Lewy body dementia.
The symptoms can sometimes overlap, which is one reason a medical evaluation is important when significant changes in memory, thinking, judgment, or behavior occur.
Is Dementia a Normal Part of Aging?
No.
Although some changes in memory can occur with age, dementia is not considered a normal part of getting older.
For example, occasionally forgetting where you placed your keys and remembering later may occur with normal aging.
Repeatedly becoming lost in familiar surroundings, forgetting how to perform familiar activities, or experiencing memory problems that interfere with daily life may be more concerning.
The CDC recommends talking with a healthcare professional when changes in memory or thinking begin affecting everyday activities.
Alzheimer’s and Dementia Resources for Families
Receiving a dementia or Alzheimer’s diagnosis can leave families with questions that extend far beyond the diagnosis itself.
Caregivers may need help understanding disease progression, finding support groups, locating respite programs, improving home safety, or simply connecting with other people who understand what they are experiencing.
Oasis Hospice previously gathered local and national programs that may help families throughout The Woodlands, Conroe, Houston, and surrounding communities.
Read our resource guide:Alzheimer’s & Dementia Awareness Month: Resources for Caregivers & Families
The guide includes dementia caregiver education, support groups, respite resources, online caregiver communities, and organizations families can turn to for additional assistance.
When Should Memory Changes Be Discussed With a Doctor?
Memory problems do not automatically mean someone has dementia or Alzheimer’s disease.
Changes in memory, thinking, or behavior can have different causes, and some may be treatable.
A healthcare professional should evaluate concerning cognitive changes, particularly when they begin interfering with daily activities.
The CDC identifies several warning signs that should prompt a conversation with a healthcare professional, including:
Memory loss that disrupts daily life
Difficulty planning or solving problems
Trouble completing familiar tasks
Confusion about time or place
Problems with speaking or writing
Frequently misplacing items without being able to retrace steps
Poor or decreased judgment
Withdrawal from work or social activities
Significant changes in mood or personality
Early evaluation can help families better understand what may be causing these changes and begin discussing treatment, safety, caregiving, financial planning, advance directives, and future care needs.
What Happens as Dementia or Alzheimer’s Progresses?
Dementia progression varies considerably from person to person and depends partly on the underlying disease.
In progressive conditions such as Alzheimer’s disease, a person typically requires increasing levels of assistance over time.
Families may gradually begin helping with:
Medication management
Meals
Dressing and bathing
Toileting
Mobility
Household safety
Communication
Eating and drinking
Decision-making
Eventually, someone with advanced dementia may become completely dependent on others for everyday care.
These changes can be difficult for families, particularly when a loved one's personality, communication, independence, and ability to recognize others begin to change.
When Can Hospice Help Someone With Dementia or Alzheimer’s?
A diagnosis of dementia or Alzheimer’s disease alone does not automatically mean someone is ready for hospice care.
Hospice may become appropriate when the disease has progressed significantly and a physician determines that the person has a life expectancy of approximately six months or less if the illness follows its expected course.
Families may begin discussing hospice when advanced dementia is accompanied by significant decline, which can include increasing dependence for daily care, difficulty communicating, reduced mobility, difficulty swallowing, decreased food or fluid intake, weight loss, recurrent infections, or other serious complications.
Hospice care focuses on comfort, dignity, symptom management, and quality of life while also providing education and emotional support to caregivers and family members.
Families wondering what care may look like as dementia becomes more advanced can also read our Oasis Hospice guide, Hospice for Dementia Patients: What Families Should Expect.
Understanding the Difference Can Help Families Plan
Understanding the difference between dementia and Alzheimer’s gives families a clearer starting point when navigating cognitive changes.
Dementia describes symptoms severe enough to interfere with daily life. Alzheimer’s disease is one specific disease that causes dementia and is responsible for the majority of dementia cases.
Regardless of the diagnosis, families do not have to navigate these changes without information and support. Speaking with healthcare providers, learning about the specific type of dementia involved, and connecting with caregiver and community resources can help families better understand what to expect and prepare for changing care needs.
From Houston to Huntsville, Houston to Livingston, and the many communities in between, Oasis Hospice is committed to providing compassionate hospice care, guidance, and support for patients and families facing advanced illness.
Frequently Asked Questions About Dementia and Alzheimer’s
Is dementia the same thing as Alzheimer’s?
No. Dementia is a general term describing a decline in memory, thinking, reasoning, or other cognitive abilities that interferes with everyday life. Alzheimer’s disease is a specific brain disease and the most common cause of dementia.
Can you have dementia without having Alzheimer’s?
Yes. Alzheimer’s disease is only one cause of dementia. Other types include vascular dementia, Lewy body dementia, frontotemporal dementia, and mixed dementia.
Which is worse, dementia or Alzheimer’s?
They cannot really be compared in that way because dementia is not one specific disease. The severity and progression of dementia depend on its underlying cause, the person's overall health, and how the condition progresses.
Does everyone with dementia eventually develop Alzheimer’s?
No. Alzheimer’s disease does not develop from other forms of dementia. Someone with vascular dementia, Lewy body dementia, or another type of dementia may never have Alzheimer’s disease, although some people can have more than one type of dementia at the same time.
Is dementia a normal part of aging?
No. Some mild changes in memory can occur with normal aging, but dementia is not a normal part of getting older. Memory or thinking problems that interfere with everyday activities should be discussed with a healthcare professional.
What is the most common type of dementia?
Alzheimer’s disease is the most common type of dementia. According to the CDC, Alzheimer’s disease accounts for approximately 60% to 80% of dementia cases.
When should families consider hospice for dementia or Alzheimer’s?
Hospice may be appropriate when dementia or Alzheimer’s disease has advanced significantly and a physician determines that the person has a life expectancy of approximately six months or less if the illness follows its expected course. Increasing dependence, difficulty swallowing, reduced food or fluid intake, weight loss, recurrent infections, and other serious complications may lead families and healthcare providers to discuss whether hospice support is appropriate.
Continue Learning
If you found this article helpful, you may also enjoy these Oasis Hospice resources:
Looking for more helpful information? Explore our Hospice Education and Health & Disease Education categories for compassionate guidance, practical resources, and answers to common questions about hospice care, caregiving, chronic illness, and the end-of-life journey.
Why Families Trust Oasis Hospice:
Oasis Hospice has been recognized as one of the highest-rated hospice providers based on Medicare.gov quality ratings. Families searching for compassionate, high-quality hospice support can compare hospice providers and learn more through Medicare.gov Care Compare. For additional education, caregiving guidance, and end-of-life support resources, families may also find helpful information through the Hospice Foundation of America.
From Houston to Huntsville, Houston to Livingston, and the many communities in between, Oasis Hospice is committed to providing compassionate hospice care, guidance, and support for patients and families during life’s most difficult moments. If you or a loved one have questions about hospice support services, Oasis Hospice is here to help families throughout Southeast Texas navigate care with compassion, dignity, and guidance every step of the way. To learn more about our hospice services and family support resources, please visit our website below.
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