Sudden Confusion: Delirium vs Dementia

Did your loved one suddenly seem very confused? This is a red flag — not just the dementia.

Today we talk about sudden confusion — when to call, and why it cannot wait.

So what does this look like? If someone you care for suddenly seems much more confused than usual — in hours or days — that is not the dementia getting worse. It is often a sign that something new is wrong in the body.

Doctors call this kind of confusion "delirium." It comes on suddenly — in hours or days. The person may not be able to focus or follow a simple conversation. It often gets worse at night, and may seem a little better in the morning.

Here is the key difference. Dementia changes slowly — over months or years. The person is pretty much the same from day to day. But sudden confusion — delirium — happens fast. It shifts through the day. That is how you know something is wrong right now. It needs a call today.

What causes sudden confusion? The most common cause is an infection — like a urinary tract infection or pneumonia. Dehydration — not drinking enough fluids — can do it too. So can low blood sugar. A new medicine, or a change in dose, can also cause sudden confusion. And pain or constipation can set it off too.

If you see sudden new confusion, call your home health nurse or provider right away. This is not something to sleep on. Your nurse can help find the cause — and many causes can be treated quickly.

Do not wait. Do not assume this will get better on its own. The sooner the cause is found, the sooner it can be treated. Call early.

Some signs need 911 right away. Call 911 if the person cannot be woken up, or is unresponsive. Call 911 for chest pain, trouble breathing, or blue lips. If you see signs of a stroke — face drooping, arm weakness, or slurred speech — call 911. Or if they have a seizure. Do not drive yourself. Call 911.

Before we go — can you name two things that can cause sudden confusion? UTI, dehydration, low blood sugar, a new medicine, or pain. If you see sudden confusion — call right away.

Sudden confusion can sometimes be the first sign of something more serious — like sepsis. Watch our next video to learn what to look for.