It is a state of sudden confusion lasting days, weeks or even months.

Delirium is a serious disturbance in a person’s mental abilities resulting in a decreased awareness of one’s environment and confused thinking.  The onset of delirium is usually sudden, often within hours or a few days.

Delirium can often be traced to one or more contributing factors, such as a severe or chronic medical illness, infection, medication, surgery, or drug or alcohol abuse.

The symptoms of delirium and dementia 癡呆 can be similar, and the input from a family member or caregiver may be important for a doctor to make an accurate diagnosis.

Delirium   click_for_detail


The signs and symptoms of delirium appear over a short period of time, from a few hours to a few days. They often fluctuate throughout the day therefore a person may have periods of no symptoms.  Primary signs and symptoms include;

    • Reduced awareness of the environment
    • Poor thinking skills (cognitive impairment)
    • Behavior changes
  • Delirium and dementia


Dehydration, drug side effects, pain, poor vision or hearing, thyroid problems, strokes, urinary tract and other infections, bleeding, or heart or breathing problems If delirium isn’t recognized and treated quickly, Older people can develop serious and life-threatening complications and loss of function.













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