The Hidden Risk of Dehydration in Dementia
July 31, 2026 | Assisted Living, Health & Wellness, Kline Galland Home, Mary Schwartz Summit, Resources
The National Library of Medicine says when a person living with dementia becomes more confused, agitated, or suddenly seems different than usual, it’s natural to assume the disease has progressed, but that’s not always the case. These changes may also signal a treatable underlying issue. One of the most common and often overlooked causes is dehydration.
More than 10 million people develop dementia each year worldwide, according to Alzheimer’s Disease International. As the number of people living with dementia continues to grow, so does the importance of recognizing these common but often overlooked health risks. Dehydration symptoms closely mirror those of dementia itself. The condition can also make it difficult for individuals to recognize or communicate that they need more fluids.
At Kline Galland, our team of highly skilled professionals is devoted to ensuring residents and patients receive the individualized attention and support they need for a healthy and comfortable care experience.
Why people living with dementia are at greater risk of dehydration
The adult human body is approximately 60% water. Every cell, including brain cells, depends on adequate hydration to carry out essential functions. When fluid levels drop, cognitive function and behavior can be noticeably affected.
Research published in the National Library of Medicine confirms that dementia can cause damage to the part of the brain that controls hunger and thirst, leaving individuals with an impaired ability to detect when they need to eat or drink. A person may not remember the last time they had something to drink. They may not recognize a glass of water placed in front of them. They may be unable to express thirst even when they feel it.
What dehydration can look like
In someone living with dementia, dehydration rarely presents as a simple complaint of thirst. It can look like:
- Unusual agitation
- Unexplained changes in behavior
- Dizziness or weakness
- Dark urine or constipation
- Dry mouth or feeling sluggish
Practical ways to support hydration
The Alzheimer’s Association explains that people with dementia may not realize they are thirsty and may forget to drink. Creating regular opportunities to hydrate throughout the day can help support fluid intake.
Strategies that experienced memory care teams rely on include:
- Offering fluids often: Don’t wait for your loved one to ask. Tie it to daily moments like meals, medications, and morning routines.
- Thinking beyond water: Juice, tea, soup, and water-rich foods like melon and cucumber all count toward daily intake.
- Keeping it familiar: Use a preferred cup or mug. Consistency in presentation reduces confusion and builds routine.
- Checking the temperature: Always test warm or hot liquids before serving.
- Watching for swallowing difficulty: Coughing, choking, or hesitation when drinking are signs worth discussing with a physician or speech therapist.
- Keeping track: A simple daily log of fluid intake helps caregivers and the care team spot patterns early.
For the caregivers navigating dementia
The hardest part of caring for someone with dementia is not always knowing what is causing a change. Dehydration will not always announce itself, but it is always worth checking.
Kline Galland’s memory care experts are here to help. Contact us to explore potential care options and how to best support your loved one aging and living with memory loss.
With information from Alzheimer’s Drug Discovery Foundation, the Alzheimer’s Association, the Alzheimer’s Society UK, Banner Health, Alzheimer’s Disease International, and National Library of Medicine: Hydration Strategies in Older Adults.
Disclaimer: This blog is intended for informational purposes and does not replace the advice of a qualified healthcare provider. If you have concerns about a loved one’s hydration or health status, please consult their physician or care team.