1. Medical and Personal History
The doctor will usually ask when the symptoms began, how they have changed and which activities have become difficult.
Questions may cover memory, concentration, language, sleep, mood, medication use, medical conditions and family history.
A relative or caregiver may be asked to describe changes they have noticed. This can be valuable because people experiencing cognitive difficulties may not always recognize the extent of the changes.
2. Cognitive Assessments
A healthcare professional may use short tests to assess memory, attention, language, orientation and problem-solving.
The person may be asked to remember a list of words, draw a clock, follow instructions, name familiar objects or answer questions about time and place.
These assessments do not establish a diagnosis on their own. They help identify areas of difficulty and determine whether more detailed evaluation is necessary.
3. Blood Tests and Medical Investigations
Blood tests may be used to investigate conditions that can affect thinking and memory, such as thyroid disorders or certain vitamin deficiencies.
A doctor may also review medications and assess other health problems that could contribute to the symptoms.
Depending on the situation, additional investigations may be recommended.
4. Brain Imaging
A CT scan or MRI may help doctors look for changes in the brain, evidence of previous strokes, bleeding, tumors or other structural problems.
Brain imaging can support the diagnostic process, but a scan alone does not necessarily confirm or exclude every form of dementia.
The results must be considered alongside the person's symptoms, medical history and cognitive assessment.
Different Types of Dementia Can Begin in Different Ways
Although the ten warning signs are useful, dementia does not look exactly the same in every person. The underlying condition can influence which symptoms appear first.
Alzheimer's disease is the most common cause of dementia. It often begins with difficulty remembering recently learned information, although planning, language and other thinking abilities can also be affected.
Vascular dementia is associated with problems involving blood flow to the brain, including damage caused by strokes or small-vessel disease. Some people develop difficulties with planning, attention, walking or thinking speed. Symptoms may appear gradually or sometimes become noticeable after a stroke.
Dementia with Lewy bodies can involve changes in attention and alertness, visual hallucinations, movement difficulties and sleep disturbances. A person may seem unusually alert at one moment and confused or drowsy at another.
Frontotemporal dementia often affects behavior, personality or language. Some people develop unusual social behavior, reduced empathy, impulsiveness or difficulty finding and understanding words. Memory may not be the first or most obvious problem.
These conditions require different approaches to assessment and care. That is another reason why a general list of symptoms should be treated as a guide rather than a diagnostic checklist.
What Families Can Do When They Notice the Signs
Recognizing possible warning signs is only the first step. How family members respond can influence whether the person feels supported or becomes more anxious.
Talk Without Blaming
Avoid telling someone that they are becoming careless, difficult or forgetful. Such comments can create shame and make the person less willing to discuss their difficulties.
Instead, describe specific observations gently.
For example, rather than saying, "You never remember anything anymore," a family member might say, "I've noticed you've seemed worried about appointments recently. Would you like us to talk to a doctor together?"
This approach focuses on the problem without attacking the person's character.
Keep Daily Routines Simple
Familiar routines can help reduce confusion and make everyday activities easier to manage.
Keeping commonly used objects in consistent places, maintaining regular meal times and using a visible calendar may help some people feel more secure.
Clear instructions and one task at a time can also reduce frustration.
Encourage Safe Independence
A diagnosis or suspected cognitive problem does not mean someone should immediately lose all independence.
Many people can continue managing some activities for a long time. The important thing is to identify which tasks have become difficult or unsafe.
If driving, cooking, handling money or taking medication has become problematic, families may need to discuss appropriate support and safety arrangements.
These decisions should be made respectfully, involving the person as much as possible.
Protect Social Connections
Regular social contact, enjoyable activities and meaningful routines can contribute to quality of life.
A person who struggles in large gatherings may feel more comfortable meeting one or two familiar people. Activities can be adapted to match their abilities rather than abandoned completely.
The aim is to preserve dignity, connection and a sense of purpose.
Can Dementia Be Prevented?
There is currently no guaranteed way to prevent every type of dementia. However, research indicates that several lifestyle and health factors are important for brain health.
Managing high blood pressure, diabetes and high cholesterol can help reduce risks associated with vascular damage. Avoiding smoking, staying physically active and limiting excessive alcohol intake are also sensible steps.
A balanced diet containing vegetables, fruit, whole grains, legumes, fish and other nutritious foods supports general health. Maintaining social connections, treating hearing problems and addressing sleep difficulties may also be beneficial.
Mental activities such as reading, learning new skills, playing games or pursuing hobbies can help keep life engaging.
These habits should not be presented as a cure or a guarantee against dementia. They are part of a broader approach to protecting health and supporting well-being throughout life.
The Most Important Message: Do Not Ignore Persistent Changes
The ten early signs described in this article are not proof that someone has dementia. Forgetfulness, fatigue, mood changes and difficulty concentrating can have many explanations.
But persistent changes deserve attention, especially when they begin to interfere with familiar routines, relationships, safety or independent living.
The image's dramatic message says that early signs should never be ignored. The most useful interpretation is not to become frightened by every forgotten name or unusual symptom. It is to recognize a pattern, seek medical advice and avoid dismissing meaningful changes as simply part of getting older.
Early evaluation can help identify treatable causes, clarify whether dementia is present and give individuals and families more time to understand their options. Depending on the diagnosis, treatment and support may help manage symptoms, maintain independence and plan for future care.
Most importantly, a person experiencing memory or thinking difficulties deserves understanding rather than embarrassment or blame. The changes may be frightening for them too, even when they cannot fully explain what is happening.
If you notice repeated memory problems, increasing confusion, difficulty with familiar tasks or unusual changes in behavior in yourself or someone you love, take the concern seriously. A conversation with a healthcare professional is a constructive first step—and one that may make a meaningful difference.