Blog

The Anger, Aggression, and Paranoia Nobody Warns You About: Behavioral Changes in Dementia

Published On
September 2, 2026
September is Alzheimer's and Dementia Awareness Month. Most of the public conversation around dementia focuses on memory loss, and for good reason. But the families who are actually living with it will often tell you that the memory loss is not the hardest part.

The hardest part is when the person you have known your entire life looks at you with suspicion and accuses you of stealing from them. Or erupts in anger over something that would never have bothered them before. Or becomes so agitated in the afternoon that nothing you do or say reaches them. Or refuses care from someone they trusted completely six months ago.

These behavioral changes are common, they are clinically explainable, and they are almost never adequately prepared for. At BrightStar Care of Madison, we work with families navigating this reality every day across Madison, Middleton, Verona, Fitchburg, Sun Prairie, and the surrounding area. This post is for those families.


Why Behavior Changes in Dementia

Behavioral symptoms in dementia are not personality flaws, deliberate choices, or signs that the person never truly had the character their family knew. They are neurological events, driven by the progressive damage that dementia causes to the parts of the brain that regulate emotion, impulse control, perception, and social behavior.

The frontal lobe, which governs judgment, emotional regulation, and the ability to inhibit inappropriate responses, is significantly affected in most forms of dementia. When that system is compromised, the filters that normally sit between impulse and action are gone or severely weakened. The person cannot moderate their emotional responses the way they once did. What looks like anger is often fear, confusion, or physical discomfort with no other available outlet. What looks like aggression is often a defensive response from a person who cannot accurately interpret what is happening around them. What looks like paranoia is often the brain's attempt to make sense of a world that no longer makes sense.

Understanding this does not make it easier in the moment. But it does change the frame. And changing the frame is the first step toward responding more effectively.

Our Alzheimer's Services Call Us at 608-441-8620


The Behavioral Changes Families Encounter

Anger and irritability. Many people with dementia become significantly more irritable, short-tempered, or prone to outbursts than they were before the illness. Small frustrations that would previously have been absorbed become triggers for disproportionate emotional responses. The person may snap at family members, refuse requests abruptly, or become hostile during care routines that were previously accepted without difficulty. This is one of the earliest and most disorienting behavioral changes for families, because it can appear before the cognitive symptoms are severe enough to fully explain it.
Physical aggression. Hitting, scratching, biting, pushing, and throwing objects occur in a meaningful proportion of people with dementia, particularly in the moderate to severe stages. Physical aggression during personal care, bathing, dressing, or repositioning is particularly common. For family caregivers who are providing this care themselves, being physically struck by a parent or spouse is one of the most emotionally devastating experiences of the caregiving journey. It is also one of the most misunderstood. In virtually every case, physical aggression in dementia is not intentional malice. It is the response of a frightened person who cannot understand what is being done to them and has no other way to communicate that fear.
Paranoia and suspicion. Paranoid thinking in dementia typically focuses on a small number of common themes: the belief that family members or caregivers are stealing possessions, that a spouse is being unfaithful, that someone is trying to harm them, or that they are being kept somewhere against their will. These beliefs are not amenable to logical correction. The person is not going to be talked out of them by being shown evidence to the contrary. The paranoia is driven by the brain's damaged ability to accurately interpret memory gaps, unfamiliar environments, and unfamiliar faces. When items are misplaced, the brain fills the gap with an explanation: someone took them. When a face is not recognized, the brain generates a threat response.
Hallucinations and misperceptions. Some people with dementia, particularly those with Lewy body dementia, experience visual or auditory hallucinations. Others experience misperceptions, interpreting shadows, reflections, or partially seen objects as something threatening or unfamiliar. A mirror can become a stranger in the room. A coat hanging on a door can become a person. These experiences are real to the person having them and require a calm, validating response rather than correction.
Agitation and restlessness. Pacing, repetitive movements or vocalizations, inability to settle, and generalized distress without a clearly articulable cause are grouped under the term agitation. Sundowning, the worsening of these symptoms in the late afternoon and evening, is a particularly common pattern. Agitation is often the behavioral signal for an unmet need: pain, hunger, thirst, a full bladder, loneliness, overstimulation, or fear. Finding and addressing the unmet need is almost always more effective than trying to manage the behavior directly.
Resistance to care. Refusing to bathe, refusing medications, refusing to get dressed, or refusing to eat are among the most functionally challenging behavioral symptoms for families and caregivers. What looks like stubbornness is usually a combination of fear, loss of understanding of what is happening, loss of the sense of personal dignity, and sometimes physical discomfort associated with the care task itself.
Disinhibition. The loss of social filters can produce behavior that is embarrassing, inappropriate, or out of character: making sexually suggestive comments, using language the person would never previously have used, undressing in public or social settings, or making blunt and hurtful remarks without apparent awareness of their impact. Disinhibition is particularly hard for families because it can feel like a revelation of something hidden, when in fact it is simply the loss of the brain circuitry that controls social behavior.

Our Alzheimer's Services Call Us at 608-441-8620




What Actually Helps

Identify and address unmet needs first. Before responding to any behavioral symptom, consider what might be driving it physically. Is the person in pain? Is there a urinary tract infection, which in older adults with dementia can cause dramatic and sudden behavioral deterioration? Are they hungry, thirsty, constipated, or uncomfortable? Is the environment too loud, too bright, or too unfamiliar? A behavioral symptom that appears suddenly or worsens significantly warrants a medical evaluation to rule out an underlying physical cause.
Do not argue, correct, or try to reason through paranoid beliefs. When a person with dementia accuses you of stealing, telling them you did not steal anything and showing them the missing item will not resolve the belief. It will generate a debate the person cannot win but will not concede. A better approach is to acknowledge the feeling behind the belief, help search for the item together, and then redirect. "It sounds like you're worried about your things. Let's look together." If certain items are frequently misplaced, keeping a small supply of duplicates reduces the frequency of these episodes.
Change your approach, not your goal. If a particular care task is consistently triggering resistance or aggression, the approach needs to change even if the goal stays the same. A different time of day, a different caregiver, a different sequence of steps, music playing in the background, a distraction introduced at the right moment, allowing more time, offering more choice within the task. Persistence through the same approach that is not working does not usually succeed. Flexibility does.
Validate feelings without reinforcing specific content. The emotional experience the person is having is real even when its content is not accurate. "I can hear that you're scared" or "I understand you're upset" acknowledges the feeling without agreeing with the false belief or pretending the behavior is acceptable. For many people with dementia, being heard and acknowledged reduces the intensity of the emotional response more reliably than any other intervention.
Manage the environment proactively. Reduce visual complexity and clutter, which can produce confusion and agitation. Reduce noise and stimulation, particularly in the afternoon and evening. Ensure good lighting, because shadows and low light produce misperceptions. Cover mirrors if seeing their reflection distresses the person. Remove or lock up items that could be used harmfully if the person becomes agitated.
Keep a behavioral log. Patterns in when behaviors occur, what precedes them, what seems to help, and what makes them worse are enormously useful, both for the family's own understanding and for conversations with the physician and the care team. Many behavioral episodes that seem random have discernible antecedents that can be managed once identified.
Talk to the physician about medication. Non-pharmacological approaches are always the first line of response for behavioral symptoms in dementia, but there are circumstances in which medication is an appropriate component of the care plan. A geriatrician, neurologist, or geriatric psychiatrist with experience in dementia care can evaluate whether medication is warranted and prescribe appropriately. This is a conversation worth having when behavioral symptoms are severe, frequent, or posing a safety risk.

Our Alzheimer's Services Call Us at 608-441-8620




When Professional Caregiving Support Becomes Essential

The behavioral symptoms of dementia are one of the primary drivers of family caregiver exhaustion and one of the most common reasons that in-home care becomes necessary even when a family caregiver is present and willing.

Managing agitation, aggression, and paranoia requires an emotional steadiness and a set of practiced de-escalation skills that are difficult to sustain when you are also the person who loves the patient, who is grieving the loss of who they were, who has been doing this for months or years without adequate rest, and who is being struck or accused by someone who once protected and cared for you. The emotional weight of that experience is real and significant.

Professional caregivers bring something different: consistent training in behavioral management, the ability to enter the person's day without the emotional history that family members carry, and the capacity to absorb difficult behaviors without the compounded grief response that is entirely natural for family members.

BrightStar Care of Madison provides skilled nursing and non-medical caregiving for individuals with dementia and their families throughout Madison, Middleton, Verona, Fitchburg, Sun Prairie, Stoughton, and the surrounding Dane County area.
Our non-medical caregivers are trained in dementia-specific communication and behavioral de-escalation approaches. They provide consistent presence, personal care, and structured daily support that reduces the anxiety and environmental unpredictability that fuel many behavioral episodes. Caregiver consistency matters in dementia care, and we prioritize matching caregivers with clients for the long term.
Our skilled nursing oversight addresses the clinical dimensions of behavioral change: coordinating with the physician when behavioral symptoms are worsening, monitoring medications and their effects, screening for the underlying physical causes of acute behavioral changes, and providing families with the clinical support they need to navigate a complex and evolving care situation.
Respite care is available for family members who need time to rest, recover, and sustain their own capacity to be present for their loved one. You cannot pour from an empty vessel, and taking care of yourself is not optional.

Our Alzheimer's Services Call Us at 608-441-8620


This September: Naming What Is Hard

Alzheimer's and Dementia Awareness Month is an opportunity to name the parts of this disease that are hardest to talk about. The behavioral symptoms of dementia are among them. They are common, they are exhausting, they are heartbreaking, and they are manageable with the right understanding and the right support.
If you are caring for someone with dementia in the Madison area and the behavioral challenges have become more than you can manage alone, BrightStar Care of Madison is here to help.


Frequently Asked Questions

Q: My parent has started accusing me of stealing. How do I respond without making things worse?

Do not deny, argue, or try to prove the accusation wrong. Those responses will escalate the situation rather than resolve it. Instead, acknowledge the worry behind the accusation, offer to search for the item together, and then gently redirect to another activity. If a particular item is frequently reported missing, check a list of common hiding places (inside shoes, under mattresses, in coat pockets) and keep duplicates of frequently misplaced items when possible. The goal is to resolve the distress, not to win the argument.

Q: My parent became physically aggressive during bathing for the first time last week. Is this going to keep getting worse?

Not necessarily, and there is often a lot that can be done to reduce the frequency and intensity of care-related aggression. The first step is to understand what drove the episode: was the person frightened, in pain, cold, rushed, or confused about what was happening? Adjusting the approach, explaining each step before doing it, using warmer water, slowing down, playing familiar music, and trying at a different time of day can make a significant difference. If a particular caregiver consistently triggers resistance, a different caregiver often produces a completely different result. Consistent aggression during personal care that cannot be resolved through approach changes is worth discussing with the physician, and is also a signal that professional caregiving support may be needed.

Q: How do I know when behavioral symptoms are a medical emergency rather than part of dementia?

Sudden, significant changes in behavior that represent a clear departure from the person's recent baseline warrant a medical evaluation, not a wait-and-see approach. Delirium, which can be caused by urinary tract infections, dehydration, medication changes, or other acute medical events, produces behavioral symptoms in older adults with dementia that can look like dementia worsening but are often treatable. Signs that warrant urgent medical attention include sudden dramatic behavioral change, fever, marked confusion beyond the usual baseline, unusual drowsiness, and new physical symptoms alongside the behavioral change.

BrightStar Care of Madison provides skilled nursing and non-medical home care services for seniors and adults throughout Madison, Middleton, Verona, Fitchburg, Sun Prairie, Stoughton, and surrounding Dane County communities. To speak with a care coordinator about dementia care support for your family this September, contact our office today.

Contact BrightStar Care of Madison:
Phone: 608-441-8620
Address: 3240 University Ave, Suite 3A, Madison, WI 53705
Visit Us Online: BrightStar Care of Madison