Overview
Alzheimer's disease is a progressive condition that damages brain cells and affects memory, reasoning, behavior, and the ability to manage everyday tasks. Alzheimer's care means supporting the person's health, comfort, dignity, and independence for as long as possible. Care needs usually change over time, from reminders and planning help in earlier stages to close supervision and personal care in later stages.
Key Symptoms
Common symptoms include memory loss that affects daily life, trouble finding words, difficulty planning or solving problems, confusion about time or place, and changes in mood or behavior. A person may repeat questions, misplace items, get lost in familiar places, or struggle with managing medicines, meals, or money. In later stages, walking, swallowing, communication, and personal care may become harder.
Causes and Risk Factors
Alzheimer's is linked to changes in the brain, including abnormal protein buildup and loss of nerve cells, but the exact cause is not fully understood. Risk rises with older age, and family history or certain genes can also play a role. Conditions that affect heart and blood vessel health, such as high blood pressure, diabetes, smoking, inactivity, and obesity, may increase risk.
Who Is Affected
Alzheimer's mainly affects older adults, but it is not a normal part of ageing. Some people develop younger-onset Alzheimer's before age 65, though this is less common. The condition affects families and caregivers as well as the person diagnosed, because support needs can become long-term and complex.
Prevention
There is no guaranteed way to prevent Alzheimer's, but healthy ageing habits may help lower risk or support brain health. These include regular physical activity, managing blood pressure and diabetes, not smoking, limiting alcohol, staying socially engaged, sleeping well, and treating hearing or vision problems when possible. Keeping the brain active through learning and meaningful daily activities may also help.
Diagnosis and Tests
Assessment usually starts with a medical history, review of symptoms, and information from a family member or caregiver. A healthcare professional may use memory and thinking tests, physical and neurological exams, blood tests, and brain imaging to look for possible causes of symptoms. Early assessment is important because some causes of memory problems may be treatable, and care planning can begin sooner.
Treatment Categories
Treatment may include medicines that can help some symptoms for a time, as well as non-drug approaches such as routines, memory aids, exercise, and support for sleep or behavior changes. Managing hearing loss, pain, depression, constipation, infections, and other health problems can also improve day-to-day function. Care plans often involve several professionals, such as doctors, nurses, therapists, social workers, and community support services.
Living With It
Daily care often works best when routines are simple, predictable, and calm. Helpful steps may include labeling rooms or drawers, reducing clutter, using reminders, checking home safety, and supervising driving, cooking, finances, and medicines when needed. Caregivers should also watch for stress, burnout, sleep problems, and depression in themselves, and seek respite or support groups when possible.
Diet and Lifestyle
Regular meals, enough fluids, physical activity, and good sleep habits can support overall health. Some people with Alzheimer's may forget to eat, lose interest in food, or have trouble chewing or swallowing as the disease advances, so meals may need to be simpler and easier to manage. A healthcare professional or dietitian can help if weight loss, dehydration, or swallowing problems develop.
When to Seek Medical Care
Arrange medical assessment if there is new or worsening memory loss, confusion, language difficulty, getting lost, behavior changes, or trouble managing daily tasks. Seek prompt care if symptoms change suddenly, because this may point to delirium, infection, stroke, medication side effects, dehydration, or another urgent problem rather than usual Alzheimer's progression. Also seek help for falls, wandering, poor eating or drinking, trouble swallowing, or caregiver strain that is affecting safety.
When It May Be an Emergency
Get urgent medical help right away for sudden confusion, new weakness on one side, trouble speaking, chest pain, severe shortness of breath, a serious fall or head injury, seizures, or if the person cannot be woken normally. Emergency care is also needed for choking, signs of stroke, severe dehydration, or behavior that creates immediate danger to the person or others.
Questions to Ask a Healthcare Professional
You may want to ask what is causing the symptoms, what tests are needed, and what stage of illness is suspected. It can also help to ask about treatment options, home safety, driving, advance care planning, community services, and support for caregivers. If eating, sleep, mobility, continence, mood, or swallowing are changing, ask how these problems should be assessed and monitored.