DefinitionConfusion is the inability to think with your usual speed or clarity, including feeling disoriented and having difficulty paying attention, remembering, and making decisions.See also: Dementia, for more information about chronic or long-term confusion.Alternative NamesDisorientation; Thinking - unclear; Thoughts - cloudyConsiderationsConfusion may come on quickly or slowly over time, depending on the cause. Many times, confusion is temporary. Other times it is permanent and not curable. It may be associated with delirium or dementia.Confusion is more common in the elderly, and often occurs during a hospital stay.Some confused people may have strange or unusual behavior or may act aggressively.Common CausesAlcohol intoxicationBrain tumorConcussionFeverFluid and electrolyte imbalan