The Surprising Shower Sign That Could Be Linked to Early Alzheimer’s Disease

Don’t Ignore a Sudden Loss of Smell Either

A sudden change in smell should not automatically be blamed on aging or dementia.

It may have a completely different cause.

Persistent or unexplained smell loss is worth discussing with a healthcare professional, particularly if it occurs with other neurological or cognitive changes.

And sudden neurological symptoms—such as facial drooping, weakness or numbness on one side, difficulty speaking, sudden severe confusion, or sudden vision or balance problems—require urgent medical attention because they can indicate a stroke.

The Bottom Line

There is a real scientific reason researchers are interested in the relationship between olfactory function and cognitive decline.

But the viral claim that you can discover the “first sign of Alzheimer’s while showering” goes too far.

The more accurate message is this:

A persistent decline in the ability to smell or recognize familiar scents—including shampoo and soap in the shower—can sometimes accompany early cognitive changes, but it has many other possible causes and cannot diagnose Alzheimer’s disease on its own.

What matters most is the bigger picture.

If smell changes appear alongside worsening memory, confusion, difficulty completing familiar tasks, language problems or changes in judgment, talking with a healthcare professional is far more useful than relying on an online shower test.