Dementia is a condition that affects memory, thinking, behavior, and the ability to perform daily activities. It is not a single disease, but a group of symptoms caused by damage to brain cells.
While mild forgetfulness can happen with ageing, most dementias involve a progressive decline that interferes with independence, relationships, and quality of life.
Early Signs and Symptoms of Dementia
Dementia symptoms vary depending on the underlying cause and stage of the condition. In most cases, they develop gradually and become more noticeable over time. While occasional forgetfulness can be a normal part of ageing, persistent cognitive changes that interfere with daily life should be assessed by a doctor.
Common Early Symptoms
People with dementia may experience:
- Memory loss, particularly forgetting recent conversations or events
- Difficulty finding the right words when speaking
- Trouble following conversations or understanding information
- Confusion about dates, time, or familiar places
- Trouble completing familiar tasks
- Misplacing items and being unable to retrace their steps
- Poor judgement or decision-making
Changes in Mood and Behaviour
Dementia can also affect a person’s emotions and behaviour. Some people may experience:
- Mood swings
- Increased anxiety or depression
- Personality changes
- Loss of interest in hobbies or social activities
- Suspicion or mistrust of others
Symptoms in the Later Stages of Dementia
As dementia progresses, individuals may require more support with everyday activities. They may experience:
- Difficulty communicating
- Difficulty recognising loved ones
- Difficulty walking or maintaining balance
- Problems eating or swallowing
- Loss of independence in daily activities
What Causes Dementia?
Dementia develops when brain cells become damaged or lose their ability to communicate effectively. Common causes of Dementia:
1. Alzheimer's Disease
The most common cause. It involves abnormal protein build-up in the brain, leading to gradual memory loss.
2. Vascular Dementia
Occurs when blood flow to the brain is reduced due to strokes or damage to blood vessels. Thinking speed, planning, and problem solving are often affected early.
3. Lewy Body Dementia
Associated with abnormal protein deposits called Lewy bodies. Common symptoms include visual hallucinations, sleep disturbances, attention difficulties, and Parkinsonian movement symptoms such as slowness, stiffness and shuffling gait.
4. Frontotemporal Dementia
Affects personality, behaviour, and language due to damage in specific brain regions.
5. Mixed Dementia
Some people have more than one underlying cause of dementia, such as Alzheimer's disease combined with vascular dementia.
Risk Factors of Dementia
Several factors can increase the likelihood of developing dementia.
Non-Modifiable Risk Factors
- Increasing age
- Family history of dementia
- Certain genetic factors
Modifiable Risk Factors
Research suggests that some dementia risk factors may be reduced through healthy lifestyle choices. These include:
- High blood pressure
- Diabetes
- High cholesterol
- Smoking
- Excessive alcohol consumption
- Obesity
- Physical inactivity
- Untreated hearing loss
- Untreated vision loss
- Sleep disorders, such as sleep apnoea
- Depression
- Repeated head injuries
How Is Dementia Diagnosed?
There is no single test that can diagnose dementia. Doctors usually combine several assessments to determine the cause of symptoms.
Medical evaluation may include:
- Medical history and symptom review
- Cognitive and memory tests
- Physical and neurological examination
- Blood tests to rule out reversible causes
- Brain imaging (MRI or CT scans)
- Assessment of daily functioning
Early diagnosis can help individuals and families understand treatment options, plan future care, and access support services sooner.
Dementia Treatment Options
Although there is currently no cure for most forms of dementia, treatment focuses on managing symptoms, slowing progression where possible, and improving quality of life.
Medications
Depending on the type of dementia, medications may help improve memory, attention, or daily functioning for some individuals.
Non-Medication Approaches
- Cognitive stimulation and memory training
- Physical activity programme
- Occupational therapy
- Speech and language therapy
- Structured routines
Managing Underlying Health Conditions
Controlling cardiovascular risk factors such as hypertension, diabetes, and high cholesterol may help reduce further vascular brain injury and further decline.
Can Dementia Be Prevented?
There is no guaranteed prevention, but healthy lifestyle choices may reduce risk.
Ways to support brain health
- Exercise regularly
- Eat a balanced diet (e.g. Mediterranean diet)
- Stay socially active
- Keep mentally engaged
- Manage blood pressure, cholesterol, and diabetes
- Get adequate sleep
- Avoid smoking
- Limit alcohol consumption
When Should You See a Doctor
Many people occasionally forget names, appointments, or where they place everyday items. However, medical attention should be sought if memory or thinking problems begin affecting daily life, work, finances, driving, communication, or personal safety.
Seek medical advice if you or your loved one experiences:
- Persistent memory loss
- Frequent confusion
- Getting lost in familiar places
- Difficulty managing daily tasks
- Personality or behavioural changes
- Poor judgement
Frequently Asked Questions (FAQ)
For Alzheimer's disease, memory loss involving recent events is often one of the earliest signs, though symptoms vary. However, other types of dementia may first present with changes in behaviour, language or problem-solving.
Yes. This is known as young-onset dementia and can occur before age 65.
No. Memory loss can occur for many reasons, including stress, sleep deprivation, medication side effects, vitamin deficiencies, and other medical conditions.
Most types cannot be cured, but treatment can help manage symptoms and improve quality of life.
If you notice persistent memory loss, confusion, or behavioural changes, seek medical evaluation early. At Nobel Psychological Wellness Centre Singapore, our psychiatrists provide assessment, diagnosis, and management for dementia and related cognitive conditions.
