Delirium and dementia
Key facts Delirium is a sudden change in your thinking and behaviour. Delirium is often caused by changes in your health, such as an infection or a medicine change. If you are in hospital and at risk of delirium, your doctor will provide care to stop delirium from happening. What is delirium? Delirium is a common problem. It appears as a sudden change in your thinking and behaviour. Delirium happens quickly and only lasts for a few days. Delirium often happens in older people, but it can happen at any age. People who have delirium when they are in hospital