It is the most common bang out ofdementia.

Each person experiences the symptoms and progresses through the stages in their own way.

The Alzheimer’s Association uses four stages to mark the progression.

Shot of a senior woman sitting alone in her living room

shapecharge / Getty Images

These changes within the brain can sometimes start 10-15 years before any symptoms become apparent.

Early Stage

Early-stage Alzheimer’s has mild symptoms.

The person may appear healthy but can often forget or struggle with some things.

In the early stages, they may be aware of their forgetfulness or struggles and experience frustration.

Loved ones like friends andfamily membersmay begin to notice little slips, too.

The sense that something is wrong may come gradually in this stage.

Middle Stage

Middle-stage (mid-stage) Alzheimers has moderate symptoms.

This stage can sometimes last for many years.

The person may gradually be unable to work and require the assistance of a family member or caregiver.

This is known assundowning.

Late Stage

Severe symptoms characterize late-stage Alzheimers disease.

Often, the person is unable to respond or communicate.

As a result, they may requirefull-time care and supervision.

Toward the end, they may be in bed all the time.

For instance, you may forget where youve parked your car or a few details from an event.

You keep losing your keys and your cell phone.

You may even forget someones name and then remember it later.

With Alzheimers, however, you may forget what your car looks like or that an event took place.

You may not be able to remember ever knowing a person.

If you’re frequently forgetful, you should inform your healthcare provider.

Alzheimer’s Association.Stages of Alzheimer’s disease.

Heart of America Chapter; 2018.

Johns Hopkins Medicine.Stages of Alzheimer’s disease.

National Institute on Aging.What are the signs of Alzheimer’s disease?

Stanford Health Care.Alzheimer’s disease symptoms.