Challenging behaviour is one of the most demanding parts of dementia care, and one of the most misunderstood. It is rarely random: it is a resident’s response to pain, fear, confusion, or an unmet need they can no longer put into words, and treating it as anything else leads to reactive management rather than person centred care. 944,000 people in the UK are living with dementia, a figure projected to exceed 1 million by 2030 and 1.6 million by 2050 (NHS England, 2024).

Recognising, interpreting, and responding to that behaviour correctly is a core competency for every care home manager and every member of staff delivering care, not a soft skill. Teams that need this embedded into daily practice, not just read once, can build it through eCert’s Challenging Behaviour in People with Dementia course.

What Is Challenging Behaviour in Dementia?

Challenging behaviour in dementia is any type of action, including aggression, agitation, wandering, repetitive behaviour, sleep disturbance, loss of inhibitions, or hoarding, that places the resident or those around them at risk, or disrupts their care and quality of life.

These behaviours are the resident’s primary remaining channel for expressing an unmet need once verbal communication has declined. This is the core clinical principle behind every strategy here: behaviour is communication, not a deliberate act. It is the foundation of Tom Kitwood’s person-centred care model, which underpins the person-centred care NICE NG97 requires providers to deliver. Treating every incident as data about an unmet need, not a problem to be managed away, is what separates reactive care from person-centred care.

For the wider picture beyond behaviour specifically, see our guide to strategies for effective dementia care in UK care homes.

Why Does Challenging Behaviour Happen in Dementia?

Challenging behaviour happens because the resident is responding to an unmet need or a neurological change they can no longer regulate, not because they are choosing to be difficult. Five categories of cause account for most incidents: physical discomfort, environmental triggers, communication barriers, neurological changes, and medication side effects.

Physical discomfort is the most underdiagnosed trigger in dementia care. UTIs, constipation, arthritis, mouth problems, and pressure sores are common pain sources in care home residents, and as dementia advances, residents lose the ability to report pain verbally and express it through agitation instead NICE NG97 recommends a structured observational pain assessment tool, such as PAINAD, for any resident who cannot self-report. A resident who is combative during toileting may be signalling undiagnosed constipation, not resisting the task itself.

Environmental triggers are magnified by care home routines. Shift handovers, visiting times, dining noise, and sudden lighting changes create spikes in sensory input, and residents respond to an overstimulating or unfamiliar environment with agitation or withdrawal. A resident agitated at the same point each afternoon is likely responding to a shift changeover.

Communication barriers develop progressively as language deteriorates, and behaviour becomes the primary channel for expressing needs. A resident who can no longer say “I need the toilet” still has the need. Without words, behaviour is how it surfaces. Language loss removes the ability to state a need, not the need itself.

Neurological changes in specific brain regions drive much of this behaviour. Damage to the frontal lobe reduces the impulse regulation that normally prevents inappropriate speech or action, which is why loss of inhibition is common as dementia progresses. Damage to the limbic system, which governs emotional processing and fear response, produces mood swings disproportionate to the trigger. These are specific, localised losses of function, not generic “brain changes.”

Medication side effects can increase agitation or confusion in residents on multiple medicines. NICE NG97 advises minimising medicines linked to anticholinergic burden and cognitive impairment, and reviewing any antipsychotic prescribed for agitation every six weeks. A behaviour change coinciding with a new prescription should trigger a medication review before a behavioural intervention is tried.

Common Challenging Behaviours in Dementia

Care home residents most commonly display six behaviours below, each shaped by the causes above: aggression, repetitive actions, wandering, sleep disturbance, loss of inhibitions, and hoarding.

1. Aggression and Agitation

One of the most distressing behaviours associated with dementia is aggression, which can manifest as verbal outbursts, physical violence, or emotional agitation. This behaviour is often triggered by confusion, pain, unmet needs, or environmental overstimulation.

Example: A person with dementia might become verbally abusive when a caregiver tries to assist them with bathing, interpreting the action as threatening or unnecessary. Similarly, they might lash out physically if they are overwhelmed by excessive noise or unfamiliar surroundings.

How to Manage Aggression:

• Identify Triggers: Keep a diary of when aggressive episodes occur to pinpoint patterns.
• Ruling Out Pain: Do this by using a structured observational assessment such as PAINAD if the resident is non-verbal.
• Stay Calm: Responding with anger can escalate the situation. Instead, use a soothing voice and gentle body language.
• Provide Reassurance: Sometimes, simple words like, “You are safe, I’m here to help,” can diffuse tension.
• Modify the Environment: Reduce the sensory load in the room before retrying the task.

2. Repetitive Actions and Speech

Repetition is a hallmark of dementia. Individuals may ask the same question multiple times, repeat phrases, or engage in the same action over and over. This behaviour often stems from short-term memory loss and a need for reassurance.

Example: An individual may repeatedly ask, “When is dinner?” even though they were told just moments ago.

How to Manage Repetition:

• Respond Patiently: Instead of pointing out the repetition, acknowledge their concern and provide a calm answer.
• Offer Distractions: Engage them in an activity that shifts their focus.
• Use Visual Aids: A daily schedule or written notes can provide reminders.
• Making a log: Log the frequency and timing in a behaviour diary: a spike can flag rising anxiety.

3. Wandering and Getting Lost

Wandering and getting lost is walking with no clear destination or safe awareness of surroundings, driven by restlessness or a resident acting on an old routine,

Example: A person with dementia may attempt to leave their home, believing they need to “go to work,” even though they retired years ago.

How to Manage Wandering:

• Identify the Pattern: Record the time and apparent purpose in a behaviour diary: recurring patterns often point to an unmet need, such as boredom.
• Ensure a Secure Environment: Install door alarms or locks that prevent unsafe exits.
• Engage in Activities: Offer structured, purposeful activity at the times wandering typically occurs.
• Identify the Reason: Wandering may be due to restlessness or a desire for routine.
• Use GPS Trackers: Devices like wristbands or smart shoes can help track movement.

Supporting dementia patients requires an understanding of such behaviours and appropriate interventions.

4. Sleep Disturbances and Night-time Restlessness

Sleep disturbances and night-time restlessness cover disrupted sleep-wake cycles, including sundowning, a pattern of increased confusion and restlessness in the late afternoon and evening that affects around one in five people with dementia.

Example: A dementia patient may wake up at 2 AM and start getting dressed, believing it is morning.

How to Manage Sleep Issues:

• Establish a Routine: Encourage regular sleep-wake cycles.
• Limit Stimulants: Reduce caffeine intake in the evening.
• Create a Relaxing Environment: Reduce evening stimulation: dim lighting and lower noise gradually as the shift changes..
• Encourage Daytime Activity: Physical activity during the day can promote better sleep.

Dementia and mood swings can be influenced by sleep disturbances, making it crucial to address rest-related issues.

5. Loss of Inhibitions and Inappropriate Behaviour

Dementia affects judgment and self-control, leading individuals to act in socially inappropriate ways, such as undressing in public or making rude comments.

Example: A dementia patient may suddenly remove their clothing in a public setting without realising it is inappropriate.

How to Manage Loss of Inhibitions:

• Gently Redirect Behaviour: Offer a blanket or guide them to a private space.
• Identify Causes: They may be feeling too hot or experiencing discomfort.
• Avoid Overreaction: Remain calm and address the situation discreetly.

6. Hoarding and Hiding Objects

Hoarding and hiding objects is the collecting, concealing, or storing of items, often food or personal belongings, usually driven by confusion, a fear of loss, or a need for security and control

Example: A resident may hide food under their mattress because they no longer trust that meals will reliably be provided, even though they are served regularly.

How to Manage Hoarding:

• Provide Safe Storage Areas: Offer dedicated boxes where they can store items.
• Maintain a Clutter-Free Home: A tidy space minimises misplaced objects.
• Reassure the Individual: Let them know their belongings are safe.

How to Respond to Challenging Behaviour in Dementia

The core approach to any episode of challenging behaviour is the same regardless of presentation: rule out a physical cause, identify the trigger, de-escalate without confrontation, and document what happened. This is a structured framework, not a checklist reserved for when things go wrong.

Check for physical causes first. Pain, infection, constipation, dehydration, and hunger are the most common undiagnosed drivers of behaviour change, and should be ruled out before any behavioural intervention is tried (Dementia UK, 2026). Use a structured pain assessment tool, such as PAINAD, whenever the resident cannot self-report.

Use the ABC model. Recording the Antecedent, Behaviour, and Consequence of each episode over one to two weeks reveals the pattern behind behaviour that looks random in the moment, replacing guesswork with a person-centred support plan. Care homes use it because it turns single incidents into evidence staff can act on.

Apply de-escalation, not confrontation. Approach from the front at eye level, lower your voice, use short single-step instructions, and avoid contradicting the resident’s version of reality. Arguing with a false belief increases distress without changing it.

Modify the environment during the incident. Reduce noise, lower bright lighting, and clear the immediate area where it is safe to do so. Sensory overload rarely resolves on its own mid-episode.

Document and identify patterns. Every episode belongs in the care plan and behaviour records, not just staff memory. Consistent documentation is what CQC inspectors expect as evidence that behaviour is being assessed and managed, not endured.

What Not to Say to Someone with Dementia

Phrasing matters in dementia care because specific phrases trigger a neurological distress response rather than a general one: dementia affects the brain regions that regulate emotional memory and shame, so a resident can retain the feeling of being wrong or dismissed long after they have forgotten the words that caused it.

“Don’t you remember? I just told you.” This draws attention to a memory failure the resident cannot control, and the shame response can outlast their memory of the conversation, surfacing later as anxiety with no apparent cause.

“Calm down.” This names the resident’s distress without addressing its cause, and can be heard as a command they feel unable to comply with, escalating rather than resolving agitation.

“You’re wrong, that’s not right.” Contradicting a resident’s belief or memory forces a confrontation their brain cannot resolve, and typically increases distress rather than restoring orientation.

“There’s nothing to be afraid of.” This dismisses a fear response the resident experiences as genuine, and can deepen distress by signalling their feelings are not being taken seriously.

Use validation instead: short sentences, redirection towards a familiar object or activity, and agreement with the emotion the resident is expressing even when you cannot agree with the facts behind it.

The Role of Caregivers in Managing Challenging Behaviours

Staff competency in dementia care is a CQC expectation, not an optional extra. Regulation 18 requires providers to ensure staff receive the training and supervision necessary for their role, and inspectors treat gaps in dementia-specific training as evidence against the Safe and Effective key lines of enquiry (CQC, Regulation 18). That matters because most of the sector is not meeting it: only 29% of the care workforce in England have had any kind of dementia training. Our guide to CQC Regulation 18 compliance breaks down what providers need to have in place.

Training also protects the people delivering care. Managing challenging behaviour daily is emotionally demanding, and staff who understand the clinical reasons behind it are less likely to experience it as personal, and better placed to sustain compassionate care over time. Our tips on supporting care home staff morale cover the wider side of that.

Key Tips for Caregivers:

• Seek Professional Help: Enrolling in Improving Outcomes in People with Dementia can equip caregivers with essential skills.
• Join Support Groups: Connecting with others can provide emotional relief and practical advice.
• Take Breaks: Respite care services offer short-term relief for caregivers.
• Focus on Self-Care: Ensure you maintain your well-being to provide the best possible care. Check out our carer well-being tips to ensure a supportive and positive environment while delivering exceptional care. 

Conclusion

Challenging behaviours in dementia can be difficult to manage, but understanding the causes and implementing effective strategies can improve the quality of life for both individuals with dementia and their caregivers. By recognising triggers, maintaining a structured routine, and using compassionate approaches, caregivers can provide better support and reduce distress.

For more guidance, explore ecert’s professional training courses. With the right knowledge and resources, managing challenging behaviours in dementia becomes a more compassionate and structured process, ensuring dignity and comfort for those affected.