Reviewed by the Help Dementia Editorial Team — our editors review every article for accuracy against guidance from the National Institute on Aging, the Alzheimer’s Association, and peer-reviewed sources.
Dementia behavior sits at the center of this dementia and brain health question.
Families often struggle to recognize that pain is causing problematic behavior in their loved ones with dementia. When someone with dementia becomes aggressive, withdrawn, or agitated, family members and even healthcare professionals frequently assume these are simply symptoms of the disease itself—when the real culprit may be untreated pain. Research shows that between 46 and 56 percent of people with dementia experience pain, with rates reaching as high as 57.7 percent among those with Alzheimer’s disease. For people with moderate to severe dementia, the problem is even more pronounced, with 50 to 80 percent experiencing daily pain.
Consider what happens when an older parent who developed dementia starts shouting and hitting caregivers during bathing. Family members might interpret this as aggression tied to the disease itself, but what they’re often seeing is a pain response—perhaps from arthritis, a urinary tract infection, or unhealed sores. Because people with advanced dementia cannot clearly communicate where it hurts or what’s wrong, their pain emerges as behavior that can easily be misunderstood and therefore goes untreated. Understanding the connection between pain and behavioral changes is one of the most important gifts families can give to their loved ones with dementia. Pain management directly affects quality of life, reduces behavioral problems, and helps maintain dignity during the disease progression.
Table of Contents
- How Pain Expresses Itself as Behavioral Changes in Dementia
- The Communication Barrier—Why Pain Is Routinely Missed in Dementia
- What Families Should Actually Look For—The Behavioral Red Flags
- Practical Tools for Pain Assessment in Dementia
- Common Misinterpretations and Pitfalls in Pain Recognition
- Having Effective Conversations with Healthcare Providers
- Building a Better Pain Management System for Your Loved One
- Conclusion
How Pain Expresses Itself as Behavioral Changes in Dementia
pain in dementia doesn’t always announce itself with the words “I’m in pain.” Instead, it manifests through behaviors that families and caregivers need to learn to interpret. Aggression and agitation are significantly correlated with pain, as are verbal outbursts like cursing and screaming. A person with dementia may strike out at caregivers, not from hostility but from fear and discomfort they cannot express. Wandering often increases when pain is present—the person is attempting to escape from physical discomfort.
Depression and social withdrawal can also signal pain, as can general fatigue and reduced activity levels. The behavioral shift is often what gets noticed first, before anyone considers pain as a cause. A family member might report that their loved one “is worse today” or “more difficult to manage,” when in fact the person is simply suffering and has no way to tell anyone. In one study of aged care residents, 65.6 percent had identifiable pain, and of those, 48.4 percent were experiencing moderate to severe pain—yet many of these cases went unaddressed because the pain wasn’t properly recognized. The tragedy is that these behavioral changes often lead to increased medication for behavioral issues rather than treatment for the underlying pain.
The Communication Barrier—Why Pain Is Routinely Missed in Dementia
The fundamental challenge is that over 90 percent of healthcare professionals report struggling to accurately assess pain in dementia patients due to communication barriers. When someone cannot tell you “my hip hurts” or “the light is bothering my eyes,” detecting pain requires a different skill set entirely. Many healthcare settings are not equipped with this skill, and even fewer family members know what to look for initially. This creates a dangerous gap in care.
Pain goes unrecognized not because it isn’t there, but because the usual tools for identifying pain—direct communication—don’t work. A person with advanced dementia may be in significant discomfort but show only behavioral symptoms, which get labeled as “difficult behavior” and managed with sedation or behavioral medications rather than with pain treatment. The research is clear: pain is often underdetected and undertreated in dementia because communication difficulties mask the suffering. Without intentional assessment and family involvement, chronic pain in dementia becomes normalized rather than managed.
What Families Should Actually Look For—The Behavioral Red Flags
Families are often the best observers of what’s changed in their loved one’s behavior, because they know the person’s baseline and baseline reactions. To recognize pain, focus on non-verbal indicators: specific changes in facial expressions, new or different vocalizations (groaning, whimpering, or unusual sounds), changes in body movements or posture, shifts in how the person interacts with others, and changes in activity patterns or sleep. If your parent with dementia suddenly becomes more withdrawn, stops eating meals they previously enjoyed, or seems to have difficulty with positions they could manage before, these can be pain signals.
If they flinch when touched in a particular area, grimace frequently, or their sleep becomes disrupted, these are important clues. Pay attention to what’s different from their recent behavior—not what’s different from before they had dementia. A person with moderate dementia might not be able to walk to the bathroom anymore, but if they were managing that task last week and suddenly can’t or won’t, pain may be the new factor. Family caregivers should document these changes and bring them to medical appointments, because healthcare providers don’t see the person in their day-to-day environment and rely on reports from those who do.
Practical Tools for Pain Assessment in Dementia
The gold standard for assessing pain in advanced dementia is the PAINAD scale (Pain Assessment in Advanced Dementia), which is recommended by UK National Guidelines and other pain assessment authorities. This tool doesn’t require the person to communicate verbally; instead, it uses observable indicators like breathing, negative vocalization, facial expression, body language, and consolability. A family member or caregiver can learn to use this scale and identify a pain score that changes when pain is present. However, PAINAD is just one tool, and the best approach uses both self-report (when the person is able to communicate) and observational assessment.
Some people with early-stage dementia can still indicate pain levels if asked directly, while others will need the observational approach entirely. The tradeoff is that while PAINAD provides structure and objectivity, it requires caregiver training and consistency. A pain score of 2 on Monday means nothing without comparison to that same person’s baseline. This is why family involvement is crucial—you establish what “normal” behavior looks like for your loved one, making changes more apparent.
Common Misinterpretations and Pitfalls in Pain Recognition
One frequent mistake is attributing all behavioral changes to dementia progression itself. While dementia does cause behavioral changes, families should never assume that a new or worsening behavior is “just the disease.” Screaming, striking out, or increased agitation can indicate pain, infection, medication side effects, or other medical conditions. A second common pitfall is focusing only on the behavior to be managed rather than investigating what might be causing it. If a person is aggressive during personal care, the temptation is to sedate them or avoid those care activities—instead, the cause should be investigated first.
A significant warning: pain management should not begin and end with sedating medication. While some medications may be necessary, untreated pain can also trigger additional complications like malnutrition, pressure sores, and further functional decline. Some families discover that when underlying pain is addressed—whether through physical therapy, addressing a medical condition, or careful use of pain medications—the behavioral issues improve dramatically without needing additional behavioral interventions. The limitation in all of this is that pain assessment in dementia remains imperfect. Even using the best tools and most careful observation, some pain will be missed, and some behavioral changes will have multiple causes that interact.
Having Effective Conversations with Healthcare Providers
When you notice behavioral changes in your family member with dementia, bringing this to a healthcare provider is essential—but how you communicate matters. Rather than saying “Dad is being aggressive,” provide specific examples: “Dad struck at me on Tuesday and Wednesday during bathing, something he hasn’t done before. He also grimaced when I touched his left shoulder.” Concrete observations are more useful than general descriptions of problematic behavior.
Ask your healthcare provider to consider pain as a potential cause and to perform a thorough medical evaluation. Mention specific activities that seem to trigger the behavior—does it happen during care routines, during certain movements, or at certain times of day? Share any patterns you’ve noticed about when the behavior is worse or better. Effective communication means treating the healthcare provider as a partner in investigation, not just as someone to report problems to. When a physician understands that a family member has carefully observed changes and suspects pain rather than simply reporting “bad behavior,” the quality of assessment often improves.
Building a Better Pain Management System for Your Loved One
The future of dementia care increasingly recognizes that family involvement in pain assessment is not optional—it’s essential. Some progressive care facilities now specifically train family members to recognize pain signals and include them directly in care planning. If your loved one is in a care facility, ask whether you can help identify their baseline behaviors and pain signals.
Advocate for regular pain assessment using structured tools, not just behavioral observation. Creating a simple log or notebook where you document behavioral changes, medications, activities, and potential triggers can be invaluable. Over time, patterns emerge: “Mom is always worse on Mondays” or “Dad winces during morning care but not evening care.” These patterns help healthcare providers identify the source and manage it appropriately. As care progresses, this family-centered approach to pain assessment becomes increasingly important, because it’s often the only reliable way to ensure that suffering is recognized and addressed.
Conclusion
Families who understand the connection between pain and behavior in dementia are better equipped to advocate for their loved one’s quality of life. Pain affects between 46 and 80 percent of people with dementia, yet goes unrecognized far too often because communication barriers make pain invisible. The behavioral changes you observe—agitation, withdrawal, aggression, or reduced activity—may be pain trying to communicate through the only means available.
The immediate step for families is to learn what to observe: facial expressions, vocalizations, body movements, and activity changes. Document when these shifts occur, share these observations with healthcare providers, and ask for thorough pain assessment. You are your loved one’s voice when they can no longer speak for themselves. By recognizing pain as a potential cause of behavioral changes, you can help ensure that treatment addresses the underlying suffering rather than simply managing the symptoms, allowing your family member to maintain the best possible quality of life during the journey with dementia.
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For more, see Alzheimer’s Association — medical tests.
