When seniors experience an acute illness, they often do not have the reserve to maintain the status quo. They may have some level of dementia. When the acute illness strikes, they become more confused and may become agitated or withdraw. This acute change in mental status is known as delirium. When someone is in the home with the senior, they can recognize this rapid change, report the condition and medical intervention can be done to prevent resolve the issue. The longer the delirium is in place the longer it takes for the senior to recuperate and regain their prior level of function.