Pain and Dementia: When Behavioral Changes Signal Untreated Pain

The Problem: They Hurt but Can't Tell You

One of the most distressing realities of caring for an elderly parent with dementia is that pain doesn't diminish as cognition declines — but the ability to communicate it does. A parent with moderate-to-severe dementia may have the same arthritic knee, the same neuropathic burning, the same postoperative ache as a cognitively intact person. What they've lost is the capacity to say "my knee hurts, it's a 7 out of 10, and the Tylenol isn't working."

Instead, the pain expresses itself through behaviour. And this is where families and even professional caregivers systematically fail: they see the behaviour — agitation, aggression, restlessness, refusal of care, screaming during transfers — and attribute it to "the dementia" rather than to unrecognised, untreated pain.

Research indicates that pain in dementia patients can be undertreated compared to cognitively intact patients with similar conditions. A parent who cannot request analgesia still needs an active pain-assessment plan.

Behavioral Cues That Point to Pain

When your parent with dementia can't verbalise pain, these behavioural changes should trigger a pain assessment:

Facial expressions: Furrowed brow, tight jaw, grimacing, rapid blinking, frowning — especially during movement, transfers, or care activities like bathing and dressing. A parent who grimaces every time you help them stand is not expressing a preference. They're in pain.

Vocalisations: Moaning, groaning, calling out, sighing heavily, or crying — particularly when these sounds increase during position changes. Repetitive vocalisation ("no, no, no" or wordless sounds) during care is one of the strongest indicators of pain in non-verbal dementia patients.

Body language: Guarding (holding a limb rigid or pulling it away), rocking, fidgeting, clenched fists, or a tense, rigid posture. A parent who curls into the foetal position in bed may be protecting a painful area.

Changes in behavior patterns: New-onset aggression during care (hitting, pushing, biting — often during tasks that involve moving a painful limb), increased agitation in the afternoon or evening (sometimes attributed to sundowning when it's actually pain escalating with fatigue), resistance to activities they previously tolerated, or withdrawal and decreased engagement.

Changes in routine: Refusing to eat (mouth pain, abdominal pain), refusing to walk (leg or back pain), sleeping more (pain-driven exhaustion), or sleeping less (pain preventing sleep). Any sudden change in a previously stable routine should prompt a pain screen before assuming it's disease progression.

Using PAINAD to Assess Pain When Words Fail

The Pain Assessment in Advanced Dementia (PAINAD) scale is the most widely validated observational tool for detecting pain in non-verbal elderly patients. It doesn't require your parent to communicate anything — you observe their behaviour for five minutes and score what you see.

How it works: Observe your parent during a care activity (transferring, bathing, repositioning) and score five categories from 0 to 2:

1. Breathing — Normal breathing (0), occasional laboured breathing or short periods of hyperventilation (1), noisy laboured breathing or prolonged hyperventilation (2)
2. Negative vocalisation — None (0), occasional moan/groan or low-level negative speech (1), repeated troubled calling out, loud moaning or crying (2)
3. Facial expression — Smiling or inexpressive (0), sad, frightened, or frowning (1), facial grimacing (2)
4. Body language — Relaxed (0), tense, distressed pacing, or fidgeting (1), rigid, fists clenched, knees pulled up, pulling/pushing away, or striking out (2)
5. Consolability — No need to console (0), distracted or reassured by voice or touch (1), unable to console, distract, or reassure (2)

Total score interpretation: A score of 2 or higher indicates significant pain that warrants clinical intervention. Use the score alongside observed behavior and trends; it is not a diagnosis or a precise measure of severity.

When to use it: Perform PAINAD assessments at consistent times — ideally during morning care (when pain is often worst), after transfers, and when behavioral episodes occur. Tracking scores over days reveals whether pain management interventions are actually working.

Management Strategies for Pain in Dementia

Start with a clinician-directed analgesia plan. When PAINAD scores suggest pain but the source isn't obvious, ask the clinician whether a monitored trial of simple analgesia is appropriate. Use only the prescribed dose and schedule, respect the geriatric acetaminophen ceiling of 3,000 mg per 24 hours (or 2,000 mg for high-risk patients), and check every combination product for duplicate acetaminophen.

If behavior improves after a clinician-directed trial, that response can help the care team assess whether pain is contributing. It does not replace evaluation for other causes of a new behavior change or the need for appropriate diagnostic testing.

Prioritise non-drug interventions alongside medication. Regular gentle repositioning can reduce pressure-related discomfort; follow the patient's care plan for frequency. Warm blankets and gentle hand massage provide comfort through touch. Music familiar to the patient can reduce agitation and pain perception. Reducing noise and environmental chaos decreases the sensory overload that amplifies pain responses in cognitively impaired patients.

Avoid medications that worsen cognition. The Beers Criteria flags several pain medications as particularly problematic in patients with dementia: anticholinergic drugs (which directly worsen confusion), benzodiazepines (which increase fall risk and delirium), and high-dose opioids (which can cause paradoxical agitation and further cognitive decline). When pharmacological pain management is needed, the clinician may consider acetaminophen or topical options (diclofenac gel, lidocaine patches), but topical products still require medication review and correct use.

Communicate findings to the medical team. Bring PAINAD scores and behavioral tracking data to the next medical appointment. "Mom scores 6 on PAINAD during morning care and drops to 2 after acetaminophen" is specific, clinical data that enables the doctor to build a proper treatment plan — far more useful than "she seems uncomfortable sometimes."

The Intersection Nobody Prepares Families For

Managing pain in a parent with dementia sits at the intersection of two of the hardest caregiving challenges, and most families navigate it without the tools or framework to do it systematically.

The Managing Chronic Pain in Older Adults toolkit includes observational pain assessment scales (including PAINAD with scoring instructions), a medication safety audit worksheet that flags dementia-unsafe drugs, and SBAR communication scripts for reporting behavioral pain findings to the medical team — built for the families dealing with this exact situation.