Delirium is a sudden and severe confusion that affects a person's ability to think clearly and stay focused. It can occur due to various factors, including infections, medications, or withdrawal from substances. Symptoms often include disorientation, changes in attention, and fluctuating levels of consciousness. This condition is more common in older adults, especially those in hospitals or nursing homes. Delirium can be temporary, but it is essential to identify and treat the underlying cause to prevent complications. Early recognition and intervention can help improve outcomes for individuals experiencing delirium.