Alzheimer’s disease and dementia affect memory, thinking, behaviour, and the ability to carry out everyday activities. Dementia is not a disease itself but rather a group of symptoms caused by different conditions, while Alzheimer’s disease is the most common cause of dementia. As these conditions progress, they can affect a person's independence and quality of life, making early diagnosis, recognition and support important.

Many people associate memory loss with normal aging, but dementia involves changes that go beyond occasional forgetfulness. Understanding the causes, symptoms, and available support can help individuals and families navigate these conditions more effectively.

Early recognition and support can make a meaningful difference.

1. What Increases the Risk of Alzheimer’s Disease?

The biggest risk factor for Alzheimer’s disease is increasing age, particularly after age 65. Other factors that may increase risk include a family history of the condition, certain genetic factors, high blood pressure, diabetes, high cholesterol, obesity, smoking, physical inactivity, hearing loss, poor sleep, social isolation, and previous traumatic brain injuries. However, having risk factors does not guarantee that someone will develop the disease.

2. What Are the Early Signs of Dementia?

Early signs of dementia often include forgetting recently learned information, repeating questions, misplacing items, difficulty finding words, confusion about time and place, trouble completing familiar tasks, poor judgment, and changes in mood or personality. These symptoms are more significant than normal age-related forgetfulness and may gradually worsen over time.

3. How Does Alzheimer’s Disease Affect the Brain?

Alzheimer’s disease usually begins with mild memory problems but can eventually affect language, reasoning, decision-making, and the ability to perform daily activities. People may become disoriented, struggle to recognize familiar people or places, and experience changes in behavior such as anxiety, depression, irritability, or withdrawal from social activities.

Researchers do not yet fully understand the exact cause of Alzheimer’s disease. Current evidence suggests it results from a combination of age-related brain changes, genetics, environmental influences, and lifestyle factors. The disease is associated with the buildup of beta-amyloid plaques and tau protein tangles in the brain, which damage nerve cells and interfere with communication between them.

4. What Are the Stages of Alzheimer’s Disease?

Alzheimer’s disease typically progresses through three stages. In the early stage, symptoms are mild and many individuals can continue to live independently. During the middle stage, memory loss and confusion become more noticeable, and daily tasks become increasingly difficult. In the late stage, individuals often require full-time assistance with personal care, communication, and daily living activities.

5. How Is Alzheimer’s Disease Diagnosed?

Doctors diagnose Alzheimer’s disease using a combination of a medical history, physical and neurological examinations, memory and thinking tests, blood tests, and brain imaging such as CT or MRI scans. These assessments also help rule out other conditions that can cause similar symptoms, including thyroid disorders, vitamin deficiencies, medication side effects, depression, and certain infections.

6. What Treatments Are Available?

There is currently no cure for Alzheimer’s disease. However, available treatments may help manage symptoms, help people maintain their independence for longer, and improve quality of life. Treatment often includes medications, cognitive support, occupational therapy, caregiver education, and management of other health conditions such as diabetes and high blood pressure.

7. Can Dementia Be Prevented?

Although dementia cannot always be prevented, research suggests that healthy lifestyle habits may help reduce the risk. Regular physical activity, a balanced diet, maintaining a healthy weight, controlling blood pressure and blood sugar, avoiding smoking, limiting excessive alcohol use, getting enough sleep, staying socially connected, protecting your hearing, and keeping the brain mentally active may all support long-term brain health.

8. Living with Alzheimer’s Disease

Living with Alzheimer’s disease can be challenging, but many people continue to lead meaningful lives for years after diagnosis. Establishing routines, using reminders, simplifying daily tasks, creating a safe environment, remaining physically active, and participating in social activities can help maintain independence. Caregivers also play a crucial role by providing support, encouraging independence where possible, ensuring safety, and looking after their own wellbeing.

9. When Should You Seek Medical Advice?

If you or a loved one experiences persistent memory loss, increasing confusion, difficulty performing familiar tasks, personality changes, or difficulty communicating, it is important to seek medical advice. Early diagnosis can help identify the cause of symptoms, provide access to treatment and support services, and allow families to plan for future care needs.