Sundowning in Dementia: Causes, Symptoms, and Management Strategies

Sundowning—also called late-day confusion—is a common behavioral phenomenon in people with dementia, characterized by increased confusion, agitation, anxiety, and restlessness that typically emerge in the late afternoon or early evening.

Common Symptoms

• Worsening confusion and disorientation – difficulty recognizing surroundings or performing familiar tasks.
• Agitation and restlessness – pacing, inability to settle, fidgeting.
• Heightened anxiety – unexplained worry or distress.
• Mood swings – irritability, frustration, sadness, or tearfulness.
• Sleep disruption – difficulty falling or staying asleep.
• Behavioral changes – wandering, repetitive movements, or loss of social inhibition leading to inappropriate remarks.

Contributing Factors

• Circadian rhythm disruption – dementia often impairs the internal body clock, blurring the sleep-wake cycle.
• Fatigue and sensory overload – accumulated daytime stimulation and declining cognitive reserves lower the threshold for confusion.
• Environmental triggers – dim lighting, shadows, noise, or changes in routine can increase disorientation.
• Unmet physical needs – pain, hunger, thirst, constipation, or medication side effects may exacerbate symptoms.

Management Approaches

There is no single cure, but a combination of non-pharmacological and, when necessary, pharmacological strategies can reduce severity:

• Maintain a consistent daily routine with regular mealtimes, activities, and bedtime.
• Optimize lighting – increase indoor lighting before dusk to reduce shadows and glare.
• Limit caffeine and alcohol, especially in the afternoon.
• Encourage daytime physical activity and exposure to natural light to reinforce circadian rhythms.
• Create a calm evening environment – reduce noise, clutter, and demanding tasks.
• Address underlying medical issues (pain, infection, medication review).
• Caregiver support and education are essential; respite care and support groups help sustain care quality.

If sundowning symptoms are severe, persistent, or pose safety risks, consult a dementia specialist or geriatrician for tailored interventions, which may include low-dose antipsychotics or melatonin under close supervision.