what is sundowning syndrome
10 hilariously insightful foreign words. Sundowners syndrome, also known as sundowning, is a type of mood or sleep disorder often associated with the early stages of dementia and Alzheimer's.ight is often a big part of treatment for this syndrome. Patients in hospitals and care facilities may not be exposed to very much sunlight during the day, which could upset the body's natural day and night rhythms and lead to sundowning.