Market scope note: This article draws on sources from both Korea and the United States. Each piece of information is labeled 🇰🇷 Korea or 🇺🇸 U.S. in the text to indicate which country it applies to.
Have you ever found a parent pacing the living room at two in the morning, or nodding off throughout the day only to be wide awake once night falls? It is easy to dismiss these nighttime sleep problems as "just part of getting older," but they are in fact clear signals the body is sending. 🇰🇷 Korea According to data from the Health Insurance Review and Assessment Service (건강보험심사평가원), 1,308,383 patients received treatment for sleep disorders in 2024, and data from Seoul National University Bundang Hospital (분당서울대학교병원) indicates that approximately 50% of Korea's older adult population suffers from sleep-related problems. Let us take a careful look at why sleep problems tend to become more pronounced in later life, and what families can do.
As we age, the very structure of sleep changes. Deep sleep (slow-wave sleep) decreases, nighttime awakenings become more frequent, and "circadian rhythm advancement" — waking earlier in the morning — sets in. According to research published in the Journal of the Korean Neurological Association (대한신경과학회지, 2025), these changes are physiological phenomena that accompany aging, but when they become excessive they affect daily life across the board. 🇰🇷 Korea Among sleep disorders in older adults, insomnia and circadian rhythm sleep disorders are the most common. Conditions involving excessive movement and abnormal behavior during sleep — such as REM sleep behavior disorder — are also more prevalent in older and male individuals, and are closely associated with neurodegenerative diseases such as Parkinson's disease.
Nighttime wandering and sundowning (Sundowning — confusion that worsens around sunset) appear especially often in older adults living with dementia. 🇺🇸 U.S. According to Mayo Clinic, sundowning is a cluster of symptoms — including confusion, anxiety, wandering, and agitation — that intensify from late afternoon through the night, and it occurs in up to two-thirds of patients with Alzheimer's disease. 🇺🇸 U.S. The medical journal MDPI (2025) summarizes that the reported prevalence of sundowning ranges widely, from 1.6% to 66% of dementia patients. When an older adult wanders in a confused state at night, serious safety incidents such as falls and becoming lost can follow, setting off a vicious cycle in which the caregiver's own sleep also breaks down.
Sleep problems are also closely linked to dementia risk. 🇰🇷 Korea According to a survey by the Korean Dementia Association (대한치매학회), patients with sleep disorders face a 49% higher risk of developing Alzheimer's disease than those without. 🇰🇷 Korea According to the 2023 Ministry of Health and Welfare Dementia Epidemiological Survey (보건복지부 2023년 치매역학조사), the prevalence of dementia among adults aged 65 and older is 9.25%, while the prevalence of mild cognitive impairment is 28.42%. Managing sleep quality is, in this sense, also a way of protecting cognitive health.
There are steps families can take in everyday life. First, ensuring your loved one gets plenty of sunlight during the day and maintains light activity helps reset the circadian rhythm. 🇺🇸 U.S. Mayo Clinic recommends that daytime activity and light exposure are effective in promoting sleep at night. Second, after the evening hours, gently dim the lighting and reduce stimulation from loud sounds or television. Third, maintaining a consistent daily routine — keeping bedtimes, wake times, and mealtimes the same every day — is essential. 🇺🇸 U.S. "Maintaining a predictable daily schedule" is also cited as a key recommendation in the management of sundowning. Fourth, if nighttime wandering is frequent, install a nightlight along the path to the bathroom and add a safety lock to the front door to prevent accidents.
We also encourage families to make full use of available caregiver support programs. 🇰🇷 Korea Under the National Long-Term Care Insurance (노인장기요양보험), the day and night care service (주·야간보호서비스) allows older adults to be cared for at a facility during hours when family caregiving is difficult; for home-visit care (방문요양), a 30% late-night surcharge applies to services provided between 10:00 p.m. and 6:00 a.m. the following day. 🇺🇸 U.S. Medicare's GUIDE (Guiding an Improved Dementia Experience) model provides family caregivers of older adults with dementia up to $2,500 per year in respite care costs, and also includes connections to care navigators and education services. 🇺🇸 U.S. Respite care for caregivers is also supported through Medicaid home care in all responding states.
Sources: Health Insurance Review and Assessment Service 2024 sleep disorder treatment statistics (as cited in KB Insurance Insight), Seoul National University Bundang Hospital information on insomnia in older adults, Journal of the Korean Neurological Association Vol. 43, No. 4 (2025), Korean Dementia Association (as cited in Seoul National University Bundang Hospital materials), Ministry of Health and Welfare 2023 Dementia Epidemiological Survey and Status Survey results, Mayo Clinic — Alzheimer's: Managing Sleep Problems (2024) / Sundowning: Late-day Confusion, WebMD — Sundowning (2025), MDPI Journal of Clinical Medicine — Sundowning Syndrome in Dementia (2025), KFF — Medicaid's Home Care Support for Family Caregivers in 2025, CMS GUIDE Model official guidance, Long-term care home-visit care fee information (angelsitter.co.kr).
Note: This article was compiled by AI from the sources cited above. We strive for accuracy, but for decisions about your specific situation, please confirm the latest guidance from a professional or the relevant agency.