Sundowning syndrome or sundowning syndrome is a well-known psychological and behavioral syndrome or phenomenon in the elderly, in which there is an increase in symptoms of delirium, hyperactivity, and possibly hallucinations, delusions, and unusual behavioral symptoms in some patients suffering from any form of dementia. It is more common in Alzheimer's disease, as studies indicate that 20-45% of people with Alzheimer's disease suffer from sundowning syndrome. The term "sundowning" refers to the appearance of these symptoms at sunset and the onset of night. The real causes of sundowning syndrome are not yet known, but it is believed that it occurs as a result of some factors such as: Treatment is done in consultation with a specialist doctor and by modifying some of the patient's behavior such as: