Dementia commonly affects mood, behavior, sleep, and personality as well as memory. These changes can become the most difficult part of caregiving and may eventually require assisted living, memory care, or nursing-home placement.
Behavioral Changes Are Expected in Dementia
These symptoms often reflect dementia-related changes in brain networks that regulate judgment, emotion, sleep, motivation, and behavior.
Common symptoms include:
- Anxiety
- Apathy
- Irritability
- Agitation
- Repetitive questions
- Suspiciousness
- Wandering
- Sleep disturbance
- Hallucinations
- Delusions Resistance to care
- Emotional outbursts.
Sudden Worsening Requires Urgent Evaluation
Dementia usually progresses gradually. A marked change over hours to days may instead represent delirium or metabolic encephalopathy and requires urgent early medical evaluation.
Causes of sudden behavior changes may include:
- Infection
- Dehydration
- Medication side-effects
- Pain
- Constipation
- Urinary retention
- Low oxygen
- Abnormal glucose or electrolytes
- Organ dysfunction
- Stroke
- Other acute illness.
Prompt treatment may allow return toward the prior baseline.
Seek immediate care for the following symptoms or problems:
- Fever
- Reduced alertness
- New weakness or speech difficulty
- Seizure
- Breathing difficulty
- Head injury
- Inability to eat or drink
- Rapidly worsening confusion
Why Do These Changes Happen?
These behaviors are caused by brain disease, not stubbornness or intentional misconduct. Impaired judgment and interpretation can produce fear, impulsivity, suspiciousness, or distress, especially with noise, crowds, unfamiliar settings, or changes in routine.
Treatment Focuses on Comfort and Safety
No treatment reliably eliminates these symptoms. Care focuses on reducing distress, supporting sleep and safety, and making daily care manageable.
Caregiver Strategies That Can Help
Start with a predictable routine, calm communication, less noise and clutter, simple choices, and checks for pain or other unmet needs.
Use DARE for anxiety, agitation, suspiciousness, repetition, or resistance to care:
- D — Do not argue: Avoid correcting or confronting
- A — Acknowledge feelings: Respond to the fear or distress
- R — Redirect: Shift attention from the upsetting concern
- E — Engage: Offer a familiar activity, music, snack, walk, photographs, or simple task
Sleep, Activity, and Calming Activities Matter
Regular sleep and daytime schedules, daylight exposure, exercise, and fewer long naps may reduce confusion, agitation, and restlessness. Familiar music, photographs, quiet outdoor time, or simple enjoyable tasks may also calm distress.
When Medicines May Be Used
Medicines used for behavioral problems are largely borrowed from psychiatry and must be individualized to the specific symptom being treated, such as depression, anxiety, psychosis, agitation, or sleep disturbance.
There is no single dementia medicine that treats all behavioral problems at once. Medication may be considered for major distress, impaired care, severe sleep disruption, or safety risks and should use the lowest-risk option likely to improve the targeted symptom.
When Home Care Becomes Difficult
Residential memory services may be the right solution at some point. Consider assisted living, a dedicated memory care unit, or nursing-home placement when the person needs continuous supervision or home care is no longer safe or sustainable.
Warning signs include wandering, aggression, hallucinations, nighttime wakefulness, falls, medication problems, resistance to care, repeated safety events, or caregiver exhaustion or illness.
Institutionalization is not a family failure; it may be the safest and most compassionate option for the person and caregiver.
These are difficult decisions, and caregivers are encouraged to seek education and support. Riverside’s Martha W. Goodson Center is designed to help and offer understanding and experience to those caring for individuals with dementia.
Key Takeaway
Behavioral changes are symptoms of brain disease, not intentional actions. Use practical strategies, seek urgent evaluation for sudden worsening, discuss medicines when distress or safety requires them, and consider facility placement when home care is no longer safe.