Sundowning, the pattern of increased confusion, agitation, and restlessness that strikes people with dementia in the late afternoon and evening, affects roughly 20% to 50% of people with dementia depending on the study. It is one of the most common reasons families ultimately move a loved one into a care facility. The good news: a combination of environmental changes, daily routines, and in-the-moment calming techniques can significantly reduce the frequency and intensity of these episodes.
What Sundowning Looks Like
Sundowning typically refers to behavioral problems that appear between roughly 3 p.m. and midnight. The symptoms vary widely. Some people become anxious or tearful. Others pace, wander, or try to leave the house. Some become verbally or physically aggressive, or experience sudden paranoia and hallucinations. The severity is measured by both the number of symptoms and how often they occur, so one person’s sundowning may look nothing like another’s.
The exact cause isn’t fully understood, but it’s linked to disruption of the body’s internal clock. Dementia damages the brain regions that regulate circadian rhythms, making it harder to distinguish day from night. Fatigue accumulated over the day, fading natural light, increased shadows, and the general winding down of household activity all seem to converge into a perfect storm for confusion.
Build a Predictable Daytime Routine
The single most effective long-term strategy is a structured, predictable daily schedule. Keeping your loved one mentally and physically active during the day serves two purposes: it reduces daytime napping (which disrupts nighttime sleep) and it provides the kind of cognitive anchoring that dementia slowly erodes. Physical activity in particular has been shown to modestly increase total nighttime sleep and reduce the amount of time spent awake after falling asleep.
Social activities also help. Even simple engagement, like conversation, card games, or group meals, is associated with slightly improved sleep quality. The key is consistency. Meals, walks, activities, and bedtime should happen at roughly the same times each day. When routines shift unpredictably, the person with dementia loses one of the few external cues they can still rely on to orient themselves in time.
Manage Light Exposure Carefully
Light is the most powerful signal your body uses to set its internal clock, and for someone with dementia, getting the right light at the right time matters more than usual.
Bright light exposure in the morning, typically above 1,000 lux at eye level (roughly the brightness of a well-lit office, or sitting near a window on a cloudy day), has been shown to improve nighttime sleep, increase daytime alertness, and reduce evening agitation. Two hours of morning bright light in the range of 2,500 lux led to more consolidated nighttime sleep in multiple studies of nursing home residents. Some research has also found that 10,000-lux bright light therapy reduced motor restlessness in people with dementia.
Evening light needs a different approach. In the hours before bedtime, keep lighting dim and warm. Researchers recommend no more than 60 lux of warm-toned light (think a soft, yellowish lamp rather than overhead fluorescents) in the evening. Interestingly, low levels of blue-spectrum light (around 30 lux) administered for two hours in the early evening also improved sleep efficiency, though this is a more specialized intervention. The practical takeaway: maximize natural or bright artificial light during the morning and keep evenings calm and softly lit. As daylight fades in the late afternoon, turn on indoor lights before the room gets dim to prevent the shadowy, disorienting environment that often triggers agitation.
Reduce Environmental Triggers
The late afternoon and evening are often the noisiest, most chaotic parts of the day in a household. Dinner preparation, visitors arriving, television noise, and the general bustle of a family evening can overwhelm someone whose brain is already struggling to process sensory information. Minimizing unnecessary noise during the vulnerable hours makes a measurable difference. That means lowering the TV volume, avoiding loud conversations nearby, and reducing the clatter of dishes or kitchen activity when possible.
Creating a deliberately calming environment during the transition from afternoon to evening helps as well. Playing familiar, gentle music or nature sounds (ocean waves, birdsong) can settle someone who is becoming restless. Keep instructions simple during this time. If bathing or other care tasks need to happen, use short, clear sentences and a calm tone.
Responding During an Episode
When sundowning is already underway, the goal shifts from prevention to de-escalation. Three techniques form the core of in-the-moment management: redirection, reassurance, and distraction. These are skills you can practice and improve over time.
Speak calmly and slowly. Listen to what the person is saying, even if it doesn’t make logical sense, and avoid correcting or arguing. If your mother insists she needs to pick up her children from school, don’t explain that her children are grown adults. Instead, acknowledge the feeling behind the statement (“You’re worried about the kids. They’re safe.”) and gently redirect attention to something else, like a snack, a familiar photo album, or a short walk to another room.
Reassure them that they are safe and that you are there to help. Gentle touch, like holding a hand or a light touch on the shoulder, can be calming when words aren’t getting through. Your own body language matters enormously. Frustration, even when hidden verbally, often comes through in posture and tone, and the person with dementia may pick up on that emotional signal even when they can’t follow what you’re saying.
When Non-Drug Approaches Aren’t Enough
Non-drug strategies are considered the first line of treatment for sundowning, and they should be tried thoroughly before considering medication. But sometimes they aren’t sufficient on their own.
Melatonin, the hormone that naturally signals sleepiness, is one option that some clinicians use to help regulate the disrupted sleep-wake cycle. It carries relatively few side effects compared to other medications. Bright light therapy combined with melatonin has shown positive effects on restlessness in some controlled trials, though the overall evidence is mixed. A Cochrane review of light therapy alone did not find consistent benefits across studies, suggesting it works better for some people than others.
Antipsychotic medications are sometimes prescribed for severe agitation, but they carry serious risks for people with dementia. A recent cohort study found that new use of antipsychotics was associated with a 2.66 times higher risk of death compared to non-use, even after adjusting for other health factors. The increased risk appears to be driven by strokes, pneumonia, and falls. These findings are consistent with years of prior research and reinforce that antipsychotics should be a last resort, used at the lowest effective dose for the shortest possible time. If your loved one is currently taking an antipsychotic, it’s worth having a conversation with their doctor about whether it’s still necessary.
Protecting Yourself as a Caregiver
Sundowning is one of the most exhausting aspects of dementia caregiving because it hits at the end of the day, when your own reserves are lowest. The pattern is relentless: just when you need to rest, the person you’re caring for needs you most. This is not sustainable without support.
If possible, arrange for another family member, friend, or paid caregiver to cover some of the late afternoon and evening hours. Even two or three evenings a week of relief can prevent the kind of chronic sleep deprivation and burnout that leads to caregiver health crises. Caregiver education programs, which teach the specific skills of redirection and environmental management described above, have been shown to modestly improve the sleep of the person with dementia as well, likely because a calmer, more confident caregiver creates a calmer environment.
Recognize that you will not handle every episode perfectly. There will be evenings when nothing works, when your patience runs out, when you raise your voice or feel resentful. That doesn’t make you a bad caregiver. It makes you a person managing one of the hardest situations in caregiving without a manual. The most effective thing you can do for your loved one over the long term is to keep yourself functional, and that means taking your own rest and mental health seriously rather than treating them as luxuries.