When the person doesn't know they are ill (anosognosia)

Many families hear a loved one insist that their memory is fine, even after they have gotten lost, missed bills or left the stove on. It is easy to think the person is being stubborn or hiding from the truth.

Often, something else is going on. Dementia can damage the parts of the brain that let a person notice their own changes. Doctors call this anosognosia (an-oh-sog-NO-zha), which means not knowing that you are ill.¹ This page explains why it happens and how to work around it, so you can keep the person safe without daily fights.

What is anosognosia?

Anosognosia is a lack of awareness of one's own illness and its limits. Some people call it "lack of insight."² A person with it may insist their memory is fine. They may refuse help, or believe they can still do tasks they can no longer do safely, such as driving or cooking.¹

It is not the same in everyone. Some people seem completely unaware. Others notice some problems but play down how serious they are.^1,4 A person may know they forget names but not see that they are getting lost or making poor choices with money.²

Lack of awareness can grow as the disease moves forward.² It is most common in the later stages of dementia, but it can show up early, even in mild cognitive impairment.^1,3

Why it happens: the brain, not the person

Our brains have systems that let us check ourselves. They help us notice "I forgot that" or "I'm not driving well." In dementia, the areas that do this checking can be damaged. These include parts of the frontal lobes (behind the forehead) and the parietal lobes (toward the top and back of the head).^1,2

Researchers have linked anosognosia to brain networks involved in self-reflection and judgment, including areas deep in the front of the brain.³ When these areas stop working well, the person cannot see their own changes. Telling them more facts does not fix this, because the tool they would use to accept those facts is the part that is damaged.^1,2

How is it different from denial?

Denial is a way the mind protects itself from bad news. A person in denial may know, deep down, that something is wrong, and may come to accept it over time.

Anosognosia is different. It comes from brain damage, not from emotion.¹ The person is not choosing to ignore the problem. Proof and reasoning usually do not change their view.²

It can be hard to tell the two apart. Some people have a bit of both. Either way, the approaches on this page help.

How common is it?

Numbers vary a lot between studies, partly because researchers measure awareness in different ways. A 2025 review estimated that between about 1 in 5 and 4 in 5 people with Alzheimer's dementia have some degree of anosognosia.³

A Spanish study looked at 127 people just diagnosed with Alzheimer's:⁴

In that study, lack of awareness was more likely in people who were older, had less schooling, or had more behavior changes.⁴

In other types of dementia. Lack of insight is very common in the behavioral form of frontotemporal dementia (FTD). It is reported in up to 3 in 4 people with FTD, though not every person has it.^2,3 In FTD, the person may also be unaware of changes in behavior, such as reckless spending, rudeness or loss of empathy.² Less is known about Lewy body dementia.³

Why it matters for families

Anosognosia can make daily care much harder. It is one reason a person may refuse medicine, doctor visits or help at home.² See refusing baths, help or medicine.

It also raises safety risks. A person who does not see their problems may not notice danger or use helpful aids, such as a pill box or a calendar.³ People with dementia often do not notice their own driving problems, so family members are usually the first to see them.⁵

Lack of awareness often comes with other symptoms. People with less awareness tend to have more apathy (loss of drive) and more agitation or unusual behavior.³ On the other hand, people who are more aware of their decline tend to have more signs of depression.³ Lack of awareness is also linked to more stress for caregivers.³

How to work around it

You probably cannot convince the person that they are ill. The goal is to keep them safe and keep your relationship strong.¹

1. Stop trying to win the argument. Skip debates about whether there is a problem. Power struggles tend to make things worse.^1,2
2. Respond to feelings, not facts. If the person says "I'm fine," you might say, "I know you want to stay independent. I want that too." Respect their view even when you disagree.¹
3. Use simple, calm words. Keep your tone warm and matter-of-fact. Give extra time to answer, and offer clear choices.⁸
4. Redirect when needed. If a talk is going badly, change the subject or suggest a walk or a snack.^1,8
5. Change the setting, not the person. Make the home safer instead of asking the person to remember new rules.² For ideas, see making the home safer.
6. Frame help as something else. A doctor visit can be a "yearly checkup." A helper at home can be "someone to help me out around the house." This may go over better than saying the help is for memory problems.
7. Praise what goes well. Notice and thank the person for tasks they do well.¹

Doctor visits

A person who believes nothing is wrong may be unhappy with a memory visit. A few steps can help.

• Keep a record. Write down specific changes you notice and when they happened. Include risky events, like getting lost.² A behavior diary or memory notebook can help.
• Share it ahead of time. Give the doctor written notes before or at the start of the visit, so you do not have to list problems in front of the person.²
• Let the person speak. Let them answer the doctor's questions unless they have asked you to.⁷
• Get permission on file. To get health details when the person is not there, you usually need a signed release form (often called a HIPAA release) or a health care power of attorney.⁷
• Look for a specialist. For suspected FTD, a behavioral neurologist or FTD specialist may help, because lack of insight can make diagnosis harder.²

See the first doctor visit about memory for more.

Driving, money and legal planning

These are the areas where lack of awareness causes the most worry.

Driving. A diagnosis alone does not always mean a person must stop driving. Each case is different.⁶ But a person with anosognosia may not see that they have become unsafe.⁵ Things that can help:^5,6

• Ask the doctor to tell the person to stop driving. The doctor can write a "do not drive" note or letter.
• Hold a family meeting with the doctor. This often works better than talking alone.
• Ask for a driving test by an occupational therapist who specializes in driving.
• Ask a respected family member or an attorney to back up the message.
• As a last step, hide the keys, disable the car or sell it. Set up other rides first.

In Virginia, anyone can report a driver safety concern to the DMV on the Medical Review Request (form MED 3). State law keeps the name of a relative or a treating doctor who reports private.⁹ The Eldercare Locator (800-677-1116) can help find low-cost rides.⁵ Read more in driving and dementia.

Money. Reckless spending and money mistakes can happen when a person does not see their own changes, especially in FTD.² Limiting access to money, credit cards and accounts may be needed.² See scams and financial abuse.

Legal papers. Planning while the person can still take part lets them name who will decide for them later.¹⁰ A person can usually sign a legal document if they understand what it means and why it matters. If you are unsure, ask the doctor.¹⁰ Key papers include a durable power of attorney for finances and an advance directive for health care. If it is too late for these, read about guardianship.

A person who does not think they are ill may still agree to plan "just in case," the same way anyone makes a will.

Can it be treated?

No medicine treats anosognosia directly. Treating the underlying disease may help with some symptoms.¹ In Alzheimer's, insight usually does not come back, so care focuses on safety and quality of life.¹

Taking care of yourself

Living with someone who says nothing is wrong can feel lonely and maddening. You may feel that no one believes you, or that the person is choosing to make life hard. Remember that the behavior is not on purpose.² It is part of the illness.

Build a team and ask for help. Support groups, counseling and respite care can ease the load.^1,2 See caregiver stress and burnout and respite care.

• Alzheimer's Association 24/7 Helpline: 800-272-3900¹
• AFTD HelpLine (for FTD): 866-507-7222²

When to get help

Also talk with the doctor if the person's refusals put their health at risk, or if you can no longer keep them safe at home.

Education only. This page is general information written from the sources listed. It is not medical, legal or financial advice and does not replace a doctor, therapist or lawyer who knows your situation. How we write and check pages.