Why Sundowning Occurs and How To Manage It

By | January 17, 2026

Sundowning is a phenomenon commonly observed in individuals with dementia or Alzheimer’s disease, where confusion, agitation, and mood swings intensify during the late afternoon and evening. Understanding why sundowning occurs and how to manage it can greatly improve the quality of life for both patients and caregivers.

What is Sundowning?

Sundowning refers to a pattern of increased confusion, anxiety, irritability, and restlessness that occurs in the evening. Symptoms can vary widely but often include:

  • Increased agitation or aggression
  • Confusion or disorientation
  • Pacing or wandering
  • Difficulty sleeping
  • Mood swings or irritability

This behavior typically begins in the late afternoon or early evening and may worsen as night approaches, creating significant challenges for caregivers.

Why Sundowning Occurs

While the exact cause of sundowning is not fully understood, several factors are thought to contribute:

1. Disrupted Circadian Rhythm

The body’s internal clock regulates sleep-wake cycles. In dementia patients, this circadian rhythm can become disrupted, leading to heightened confusion and agitation in the evening.

2. Fatigue

After a long day, individuals with cognitive impairment may become overtired, which can exacerbate confusion and irritability.

3. Reduced Lighting and Shadows

As daylight fades, shadows and dim lighting can increase anxiety or misperception in dementia patients. This may trigger fear or hallucinations, leading to sundowning episodes.

4. Unmet Needs

Hunger, thirst, pain, or the need for a restroom can manifest as agitation in the evening. Individuals with dementia may struggle to express these needs, causing stress and restlessness.

5. Environmental Triggers

Noise, clutter, or a change in routine can contribute to agitation during the late afternoon and evening.

For more in-depth research, you can read Alzheimer’s Association on Sundowning.

How to Manage Sundowning

Although sundowning can be challenging, there are strategies to reduce its impact:

1. Maintain a Consistent Routine

Keeping daily activities at the same time every day helps stabilize the patient’s internal clock and reduce confusion.

2. Optimize Lighting

Ensure adequate lighting in the evening to minimize shadows and confusion. Exposure to natural daylight during the day can also support a healthy sleep-wake cycle.

3. Encourage Physical Activity

Regular exercise during the day can help reduce restlessness in the evening. Short walks, stretching, or simple exercises can be beneficial.

4. Limit Caffeine and Sugar

Avoid caffeinated drinks or sugary snacks late in the day, as they can increase agitation or interfere with sleep.

5. Create a Calm Environment

Reduce noise, avoid overstimulation, and play soothing music if appropriate. Gentle reassurance can help alleviate anxiety.

6. Address Medical or Emotional Needs

Check for pain, hunger, thirst, or the need to use the restroom. Sometimes, simply meeting these needs can significantly reduce sundowning behavior.

7. Consider Professional Guidance

Consulting a healthcare provider can help explore medical interventions or behavioral strategies. Sometimes medications may be needed if sundowning severely affects sleep or safety.

Final Thoughts

Sundowning can be distressing, but understanding its causes and implementing effective strategies can make evenings more manageable for both caregivers and patients. By focusing on routine, environment, and overall well-being, it’s possible to reduce the frequency and intensity of sundowning episodes.

For more tips on dementia care, visit National Institute on Aging.

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