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.
Cause agitation sits at the center of this dementia and brain health question.
Yes, pain causes agitation in dementia. When a person with dementia experiences untreated pain, it often manifests not as a clear complaint of “I hurt” but rather as restlessness, outbursts, resistance to care, or emotional distress. This connection between physical pain and behavioral changes is one of the most overlooked aspects of dementia care. A person with dementia may not be able to locate their pain, describe it, or even recognize it as pain—yet their body and brain still register the distress, which can emerge as agitation. Consider the case of an 82-year-old woman with advanced Alzheimer’s who suddenly became verbally aggressive and resistant during bathing.
Only when her family noticed she winced when her arthritic shoulder was touched did they realize her aggressive behavior stemmed from shoulder pain, not behavioral decline. This pain-agitation connection affects a staggering number of people. Around 50% of people with dementia experience pain regularly, yet pain remains underdetected and undertreated in this population. Among the 83% of nursing home residents with dementia who experience pain, the vast majority have pain that goes unrecognized or is treated inappropriately. The link is not coincidental—research demonstrates a significant positive association between pain and behavioral changes, with pain specifically linked to agitation, aggression, and depression in people with dementia.
Table of Contents
- Why Does Pain Trigger Agitation in Dementia?
- The Hidden Prevalence of Pain in Dementia Settings
- How Pain Manifests as Behavioral and Psychiatric Symptoms
- Recognizing Pain When Someone Cannot Tell You
- The Assessment and Treatment Gap in Dementia Care
- Medication Options and Emerging Treatments
- Shifting Toward Pain-Centered Dementia Care
- Conclusion
Why Does Pain Trigger Agitation in Dementia?
The relationship between pain and agitation in dementia operates through several interconnected pathways. When someone with dementia experiences pain, their cognitive decline makes it nearly impossible to process, understand, or communicate the sensation in typical ways. The brain regions responsible for interpreting and expressing pain are often already compromised by dementia. Instead of saying “my knee hurts,” a person may become irritable, resist help from caregivers, or display sudden behavioral shifts that seem unrelated to any physical cause.
Research shows a meta-analysis odds ratio of 1.25 indicating a significant positive association between pain and behavioral and psychological symptoms of dementia (BPSD). More specifically, pain shows associations with agitation (OR = 1.17), aggression (OR = 1.07), and depression (OR = 2.11). This means that people with dementia who experience pain are substantially more likely to display agitation and other behavioral problems. The intensity of this relationship varies—depression is more strongly associated with pain than agitation—but agitation remains one of the most visible and distressing outcomes when pain goes unaddressed. A person who cannot tell you their hip hurts may instead pace constantly, pick at their clothes, or become combative during transfers.
The Hidden Prevalence of Pain in Dementia Settings
The scale of undetected pain in dementia care is sobering. Among hospitalized dementia patients, 27% self-reported pain on admission, with this rising to 39% reporting pain on at least one occasion during their hospital stay. In nursing homes, the figures are even more alarming: an estimated 83% of residents with dementia experience pain that often goes unrecognized or is inappropriately treated. This creates a hidden epidemic where the vast majority of people with dementia are living with untreated or inadequately treated pain that drives their behavioral changes.
One critical limitation in addressing this problem is that these statistics rely on self-report or clinical assessment—both unreliable in dementia populations. A person in early dementia might report pain verbally, but someone in moderate to advanced stages may lose the language skills or cognitive ability to communicate where it hurts or even that they hurt. This explains why pain prevalence figures likely underestimate the true picture. Many cases of pain-driven agitation never get counted in statistics because the pain itself is never formally identified. The warning here is clear: if your loved one or patient has dementia and is displaying new behavioral problems, pain should be assumed as a possible cause until ruled out through careful observation and clinical evaluation.
How Pain Manifests as Behavioral and Psychiatric Symptoms
Behavioral and psychiatric symptoms of dementia affect up to 85% of people with dementia over a 5-year period, with agitation and aggression occurring in 50-80% of nursing home residents with cognitive deficits. What many families and even some caregivers don’t realize is that pain is associated with 13 different types of BPSD, including agitation, aggression, anxiety, care refusal, delirium, depression, hallucinations, sleep disturbances, and wandering. This means pain can drive an enormous range of behavioral changes, making it essential to consider pain as a root cause before attributing all behavioral changes to the dementia itself. For example, a man with vascular dementia who starts wandering at night, refusing meals, and becoming withdrawn might be assumed to be experiencing behavioral decline.
Yet if he has undiagnosed prostate pain or constipation—both common in aging—addressing the pain can completely reverse the behavioral symptoms. Another example: a woman who becomes aggressive during care routines may be experiencing pain from arthritis or a urinary tract infection. Once the pain is treated, her aggression often diminishes significantly. This highlights a crucial point: behavioral changes in dementia are not always irreversible symptoms of disease progression. Many are reversible responses to undertreated physical conditions, and pain is among the most common and most overlooked of these conditions.
Recognizing Pain When Someone Cannot Tell You
The assessment challenge is enormous. Over 90% of registered nurses, general practitioners, and psychiatrists report difficulty accurately assessing pain in people with dementia. This high rate of assessment difficulty exists because cognitive deficits make it hard to identify and localize pain, and people with dementia may not use typical pain behaviors or language. A person with dementia might not cry out, might not hold the injured area, or might not say “pain.” Instead, they might just become difficult to manage. Recognizing pain requires learning to observe behavioral changes and physical cues rather than relying on verbal reports.
Look for: sudden changes in behavior, increased agitation, resistance to care routines, guarding of a particular body part, facial expressions of discomfort, changes in sleep or appetite, or increased vocalization. Compare the person’s baseline behavior to their current behavior—any significant shift may signal pain. A practical approach involves systematically considering common sources of pain in older adults with dementia: arthritis, falls or injuries, constipation, urinary tract infections, medication side effects, and dental problems. If you notice behavioral changes, gently check for pain in these areas. The tradeoff is that this process requires time and careful observation, but it can prevent unnecessary behavioral medication and address the actual root cause.
The Assessment and Treatment Gap in Dementia Care
The difficulty in assessing pain in dementia leads to a cascade of problems. Many healthcare providers, faced with behavioral agitation they cannot easily address through pain identification, turn to antipsychotic medications and sedatives to manage the behavior rather than treating the underlying pain. This creates a treatment gap where behavior is medicated but the actual cause—pain—goes untouched. The warning here is critical: while medications may quiet behavioral symptoms, they do not address the person’s suffering and can introduce additional risks.
Research demonstrates that agitation and aggression symptoms decrease when pain is effectively addressed, with significant reduction in psychotropic medication usage shown in patients with moderate to severe dementia when pain is treated. This means that in many cases, properly treating pain actually reduces the need for behavioral medications. However, pain treatment itself requires careful consideration. Over-the-counter pain relievers like acetaminophen are often underdosed in older adults; prescription NSAIDs carry risks for people with certain medical conditions; and opioid use in dementia must be carefully monitored. The goal should be systematic pain assessment, appropriate pain treatment, and monitoring of whether behavioral symptoms improve—a process that requires time and clinical skill but often produces better outcomes than behavioral medication alone.
Medication Options and Emerging Treatments
When pain-driven agitation is properly identified, treatment options exist. The FDA approved brexpiprazole on May 11, 2023, as a supplemental treatment for agitation associated with dementia. However, this medication carries risks of cardio-cerebrovascular events and should only be used when pain and other reversible causes have been addressed.
The existence of FDA-approved medications for dementia agitation sometimes creates a false sense that medication is the primary answer—when in fact addressing underlying pain often provides greater benefit with fewer side effects. Pain management for people with dementia often requires a multi-modal approach: physical therapy, topical treatments (creams, patches), scheduled doses of appropriate pain medication, heat or cold therapy, and non-pharmacological approaches like massage or gentle movement. The key is that this approach requires careful individual assessment and monitoring, which demands more clinical attention than simply prescribing a behavioral medication—but the results often justify this effort.
Shifting Toward Pain-Centered Dementia Care
The emerging understanding of pain’s role in dementia agitation represents a significant shift in how dementia care should be approached. Rather than viewing all behavioral changes as inevitable symptoms of dementia requiring medication, healthcare providers and families are increasingly recognizing that many behavioral problems are actually the person’s way of communicating unmet needs—most commonly, pain. This shift has practical implications for how dementia care is structured, who assesses for pain, and what gets tried first when behavioral problems emerge. As dementia care evolves, pain assessment is becoming recognized as a fundamental component of dementia care, not an afterthought.
Training for dementia care workers increasingly includes pain assessment skills. Research continues to refine how we detect pain in non-verbal populations. And family members are increasingly empowered to recognize pain as a likely cause of behavioral changes, positioning them to advocate for proper assessment before behavioral medications are started. This forward-looking approach—treating pain first, assessing thoroughly, and minimizing unnecessary psychotropic medication—offers better quality of life for people with dementia.
Conclusion
Pain and agitation in dementia are deeply intertwined, yet this connection remains widely overlooked in everyday care. Around 50% of people with dementia experience regular pain, and among nursing home residents, the figure reaches 83%. When this pain goes unaddressed, it frequently emerges as agitation, aggression, or other behavioral changes that are mistaken for dementia progression and treated with medication instead of pain management. The association is statistically significant and clinically important: addressing pain often reduces agitation without requiring behavioral medications.
The path forward requires vigilance from families and caregivers. When behavioral changes emerge in someone with dementia, consider pain as a likely cause. Observe carefully for signs of physical discomfort, systematically check for common sources of pain, and advocate for proper pain assessment before jumping to behavioral medications. For healthcare providers, this means allocating time for pain assessment despite its difficulty, treating pain appropriately when found, and monitoring whether behavioral symptoms improve with pain management. This approach respects the dignity of people with dementia as people in pain, not people with simply “difficult behaviors,” and often produces better outcomes with fewer medications.
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For more, see Alzheimer’s Association — caregiving.
