---
title: "What Is Alzheimer's disease? Home Care Glossary | HomeCare.com"
description: "Alzheimer's disease is a progressive brain disorder that slowly harms memory, thinking, and eventually the ability to do simple tasks. It is the most..."
url: https://homecare.preview.multisites.ai/glossary/alzheimers-disease/
publisher: HomeCare.com
phone: 800-974-3458
start: https://care.homecare.com/?source=homecare.com
---

Daily living and health

# Alzheimer's disease

Alzheimer's disease is a progressive brain disorder that slowly harms memory, thinking, and eventually the ability to do simple tasks. It is the most common cause of dementia in older adults. There is no cure. Some medicines may help manage symptoms or slow decline for some people.

## Why it matters for your family

Alzheimer's usually begins with memory trouble and grows over years. Later stages bring needs for help with bathing, dressing, eating, and safety. Families often start by watching for changes and seeing a doctor for a full evaluation. The right diagnosis matters because other conditions can look similar. A common mistake is treating early signs as normal aging. Plan early for care, legal papers, and support. Home care, adult day programs, and respite can ease the load as needs grow. The Alzheimer's Association offers a free 24/7 helpline at 800-272-3900. Keep a short written record of changes, since dates and examples help the doctor.

Source: [nia.nih.gov](https://www.nia.nih.gov/health/alzheimers-and-dementia/what-alzheimers-disease)

[Read more: Caring for Alzheimer's and Dementia Patients at Home with help from HomeCare.com: A Guide for Families](https://homecare.preview.multisites.ai/chronic-conditions/alzheimers-dementia-home-care/)

## Related terms

-   [**Dementia**Dementia is a group of symptoms, not one disease.](https://homecare.preview.multisites.ai/glossary/dementia/)
-   [**Alzheimer's care**Alzheimer's care is support for a person with Alzheimer's disease, the most common cause of dementia.](https://homecare.preview.multisites.ai/glossary/alzheimers-care/)
-   [**Mild cognitive impairment**Mild cognitive impairment (MCI) is an early stage of memory or thinking decline that the person and family can notice but that does not stop most daily activities.](https://homecare.preview.multisites.ai/glossary/mild-cognitive-impairment/)
-   [**Sundowning**Sundowning is increased confusion, anxiety, or agitation that some people with Alzheimer's disease or other dementia feel from late afternoon through night.](https://homecare.preview.multisites.ai/glossary/sundowning/)
-   [**Dementia care**Dementia care is support for people with memory loss and other thinking problems that disrupt daily life.](https://homecare.preview.multisites.ai/glossary/dementia-care/)
-   [**Advance care planning**Advance care planning is the process of thinking about and sharing your wishes for future medical care.](https://homecare.preview.multisites.ai/glossary/advance-care-planning/)

[All glossary terms](https://homecare.preview.multisites.ai/glossary/)

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