What is the difference between delirium and dementia?

Attention vs memory. Delirium also known as acute confusional state involves difficulty with brain functioning in the context of an acute medical or surgical condition. Attention deficits are the hallmark and other symptoms include hallucinations, confusion, memory impairments and other areas. Dementia involves memory problems, loss of functioning and other brain impairments. It is usually progressive and permanent.
Consciousness. Delirium is defined as waxing and waning consciousness while dementia is related to cognitive decline without a chage in consciousness.

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Please help! What is the difference between delirium &dementia?

Temp vs. Permanent. Delirium is sudden, severe confusion and rapid changes in brain function that occur with physical or mental illness or drug or alcohol use. It can be acutely lethal, but properly managed is also temporary and reversible. Dementia (which can predispose to delirium), is usually stepwise, progressive loss of brain function in multiple domains (e.g. Memory, planning ability, language). Hope this helps. Read more...
Sxs. Delirium is an acute confusional state caused by many possible things...A waxing and waning level of consciousness is the hallmark of delirium.... Read more...