10 early signs of dementia you shouldn't ignore - and the habits you should start today

Everyone forgets things from time to time—where they left their keys, why they walked into a room, or the name of someone they met before.

In most cases, this is completely normal, especially during periods of stress, exhaustion, or poor sleep.

But when memory problems begin interfering with daily life, appear alongside changes in behavior, or make familiar tasks difficult, the body may be signaling something more serious.

What Is Dementia?

Dementia is not a single disease, but an umbrella term for a group of conditions that gradually affect memory, thinking, language, judgment, and the ability to manage everyday life.

It becomes more common with age, but it is not a normal or inevitable part of aging.

Here are 10 early warning signs worth knowing, along with several habits that may help support brain health.

One of the Biggest Challenges

Dementia often develops gradually.

Early changes can be so subtle that they are easily blamed on tiredness, stress, low mood, or ordinary age-related forgetfulness.

Someone may begin repeating questions, struggling to pay bills, or withdrawing from social activities without their family realizing that a new pattern is developing.

Early diagnosis does not always lead to a cure, but it can help identify the underlying cause, begin appropriate treatment, provide support, and allow families to plan for the future while the person can still participate in important decisions.

1. Memory Loss That Interferes With Daily Life

Occasional forgetfulness is normal.

A more concerning warning sign is difficulty remembering new information in a way that affects everyday functioning.

A person may forget recent conversations, important events, or appointments. They may repeatedly ask the same question without remembering the answer.

They may also begin relying increasingly on notes, phone reminders, or family members to handle tasks they once managed independently.

The key difference is between occasional forgetfulness and a persistent pattern that continues to worsen.

2. Difficulty Planning or Solving Problems

Dementia can affect the ability to plan, organize, and follow several steps in sequence.

Someone who once managed household finances easily may begin missing payments, paying the same bill twice, or struggling with simple calculations.

A familiar recipe they have prepared for years may suddenly seem complicated, and everyday decisions may take much longer than before.

A one-time mistake is not necessarily concerning. But repeated difficulty with familiar tasks deserves attention.

3. Confusion About Time or Place

People experiencing cognitive changes may lose track of time.

They may become confused about the date, season, or day of the week, or struggle to understand how much time has passed since an event.

In some cases, a person may arrive somewhere familiar and not remember how they got there or how to return home.

Their sense of direction in familiar surroundings—such as their home, neighborhood, or workplace—may also deteriorate.

Everyone occasionally forgets what day it is. The difference is that persistent confusion or getting lost in familiar places is more concerning.

4. Difficulty Understanding Images and Spatial Relationships

Dementia does not affect memory alone.

For some people, early changes involve the way the brain processes visual information and judges distance.

A person may have trouble reading, recognizing objects or faces, distinguishing colors, or judging the distance between themselves and another vehicle.

Such changes can make driving, walking down stairs, or pouring a drink more dangerous.

Of course, vision problems can also result from cataracts or other eye conditions. That is why proper evaluation is important rather than assuming dementia is the cause.

5. Trouble Finding Words or Following a Conversation

Everyone occasionally gets stuck searching for the right word.

But when this happens frequently, a person may struggle to participate in conversations, lose their train of thought, or repeat themselves several times.

They may use the wrong name for a familiar object—for example, describing a clock as “the thing that shows the time” because they cannot recall the word.

Following a conversation involving several people may also become increasingly difficult.

If someone who was once highly communicative begins avoiding conversations because they cannot follow them, the change is worth noticing.

6. Putting Things in Unusual Places

Losing your keys or glasses is nothing unusual.

Usually, we can retrace our steps and remember where we last used the item.

With dementia, objects may start appearing in highly unusual places: keys in the refrigerator, a wallet in the bathroom cabinet, or a TV remote in a kitchen drawer.

The person may be unable to retrace their steps and may even accuse others of stealing their belongings.

When this happens repeatedly and becomes increasingly extreme, it can be a warning sign.

7. Declining Judgment

Dementia can affect the ability to assess risks and make safe decisions.

Someone who was once careful with money may suddenly give large amounts to strangers, repeatedly fall for scams, or make unusually large purchases.

They may also neglect personal hygiene, wear inappropriate clothing for the weather, or fail to recognize dangerous situations.

Everyone makes poor decisions occasionally. The concern is a clear and persistent change from the person's previous behavior.

8. Withdrawal From Social Activities

Someone in the early stages of dementia may begin giving up hobbies, family gatherings, or activities they once enjoyed.

Sometimes the reason is not a loss of interest, but difficulty following conversations, remembering rules, or performing activities that once felt effortless.

They may feel embarrassed, frustrated, or afraid that others will notice the changes.

Social withdrawal can also be linked to depression, anxiety, hearing problems, or other medical conditions. But a new and persistent change should be evaluated.

9. Changes in Mood or Personality

Dementia can alter how a person responds to their surroundings and regulates emotions.

Someone who was previously calm and sociable may become suspicious, frightened, irritable, or impatient. Others may become apathetic, depressed, or less motivated.

There may also be rapid mood changes, unusually strong reactions to minor situations, or discomfort in unfamiliar places.

A personality change does not automatically mean dementia. Medications, pain, depression, infections, and other medical conditions can also affect behavior.

However, a sudden or progressively worsening change warrants medical attention.

10. Difficulty Following Conversations and Thoughts

An ordinary conversation can become exhausting for someone developing dementia.

They may lose track of what is being discussed, struggle to understand a simple question, or need much longer than usual to respond.

When several people are talking at once, the confusion can become even greater.

The person may suddenly change the subject, give an answer unrelated to the question, or appear unable to follow what is happening.

This is not necessarily a hearing problem. Sometimes the difficulty lies in how the brain processes and retains information.

What Is Normal Aging—and What Requires Evaluation?

Mild forgetfulness does not necessarily mean dementia.

Normal age-related changes can include forgetting someone's name and remembering it later, making an occasional mistake when paying a bill, or briefly confusing the day of the week.

More concerning signs include being unable to recall information even later, repeatedly asking the same question, struggling with everyday tasks, or losing independence.

Even one warning sign does not prove that someone has dementia. Memory problems can also result from vitamin B12 deficiency, medications, depression, thyroid problems, sleep disorders, and other medical conditions—some of which are treatable.

That is why professional evaluation is important rather than attempting to diagnose the problem yourself.

Why Is Early Diagnosis So Important?

An early diagnosis may help doctors identify reversible conditions or offer treatments that can help manage symptoms.

It also gives the person and their family time to make decisions about treatment, living arrangements, finances, and future support while the person can still take part in the process.

They can also connect with support services, make the home safer, and learn how to handle potential changes ahead.

The message is not to panic every time you forget something—but not to ignore a persistent change that interferes with daily life.

Habits Worth Starting Today

There is no single action that can guarantee a person will never develop dementia.

Age, genetics, and certain diseases are beyond our control. But some lifestyle and general health factors can be influenced.

Protecting cardiovascular health is also important for the brain, which depends on a healthy supply of blood and oxygen.

1. Stop Smoking

Smoking damages blood vessels, increases the risk of stroke, and is associated with a higher risk of cognitive decline and dementia.

Quitting benefits health at almost any age, even after years of smoking.

Anyone struggling to quit can seek help from a doctor or smoking-cessation program rather than trying to do it alone.

2. Check Your Vitamin B12 Level

Vitamin B12 deficiency can cause fatigue, weakness, numbness, confusion, and memory problems.

It is more common among older adults, vegans, vegetarians, and people with absorption problems or those taking certain medications.

There is no need to take supplements without a reason. A simple blood test can determine whether a deficiency exists, and a doctor can recommend appropriate dietary changes or treatment.

3. Stay Physically Active

Physical activity supports cardiovascular health, sleep, and mood—all of which are also connected to brain health.

Walking, swimming, cycling, dancing, and strength training can all be good options, depending on a person's health.

There is no need to begin with intense exercise. Regular daily movement is better than prolonged inactivity.

Anyone with a chronic condition or who has not exercised for a long time should consult a doctor before starting a new program.

4. Check for Vitamin D Deficiency

Low vitamin D levels have been associated in studies with a higher risk of various health problems, including cognitive decline.

However, taking supplements does not guarantee protection against dementia, and excessive amounts can be harmful.

Moderate sun exposure, a balanced diet, and blood testing when recommended by a doctor are safer ways to determine whether treatment is needed.

5. Drink Coffee in Moderation

Some studies have found a possible association between moderate coffee consumption and a lower risk of cognitive decline, but there is no proof that coffee prevents dementia.

Caffeine can also interfere with sleep, increase anxiety, and cause palpitations in some people.

People who enjoy coffee do not necessarily need to give it up, but there is no reason to start drinking it as a preventive treatment. The appropriate amount varies from person to person.

6. Protect Your Head

Head injuries, particularly repeated ones, may increase the risk of cognitive problems later in life.

Wearing a helmet while cycling, doing hazardous work, or participating in certain sports can reduce the risk of serious injury.

It is also important to prevent falls at home through good lighting, removing obstacles, and addressing vision or balance problems.

7. Limit Alcohol Consumption

Heavy alcohol consumption can directly damage the brain and increase the risk of high blood pressure, stroke, and head injuries.

Reducing heavy drinking and avoiding dangerous levels of alcohol consumption is therefore advisable.

Anyone who has difficulty controlling their drinking should seek medical help. People with alcohol dependence should not stop abruptly without medical guidance.

8. Keep Your Brain Active and Stay Socially Connected

Reading, learning a language, playing an instrument, solving puzzles, and learning new skills can challenge the brain and maintain mental engagement.

Social connections matter too. Conversations, spending time with friends, volunteering, and group activities can help reduce loneliness and provide emotional and mental stimulation.

No particular game or puzzle can guarantee protection against dementia, but an active and engaged lifestyle can contribute to overall health and quality of life.

9. Prioritize Sleep and Reduce Stress

Chronic sleep deprivation can impair memory, concentration, and mood—even in people without dementia.

Maintaining a regular sleep schedule, reducing screen use before bed, and addressing loud snoring or nighttime breathing interruptions can help.

Chronic stress can also affect sleep and concentration. Exercise, time outdoors, breathing exercises, and talking with someone close can help.

When anxiety or stress begins interfering with daily functioning, professional help may be appropriate.

Don't Ignore Sudden Changes

Dementia usually develops gradually.

Confusion that appears suddenly over hours or days is not typical of ordinary dementia progression and may be caused by an infection, medication, dehydration, low blood sugar, or stroke.

A sudden change in memory, speech, orientation, or behavior requires prompt medical attention—especially if accompanied by weakness on one side, facial drooping, difficulty speaking, or an unusual headache.

The Body and Brain May Signal Trouble Before a Diagnosis

A person does not need to have all ten signs before there is reason to seek an evaluation.

Sometimes a family member notices a change before the person does. In other cases, the person senses that something is different but is afraid to talk about it.

A calm, respectful conversation without accusations can be the first step.

Early diagnosis does not eliminate the difficulty, but it provides time, options, and support—and sometimes reveals that the symptoms are caused by another treatable condition.

Pay attention to persistent changes, protect your brain just as you protect your heart, and don't be afraid to ask for help.

Share this information with your family and friends. Someone close to you may need a reminder that they don't have to face these changes alone.