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Signs You Have Alzheimer's, According to Brain Experts

Signs of Alzheimer’s experts look for.
FACT CHECKED BY Emilia Paluszek

Alzheimer's disease is the most common form of dementia and affects as many as 5.8 million adults in the US. "One out of 3 cases of Alzheimer's may be preventable if that person does everything right," says Dr. Richard Isaacson, director of the Alzheimer's Prevention Clinic at Weill Cornell & New York-Presbyterian Medical Center in New York City. "20 to 30 years is ample time to make brain-healthy choices." Here are five signs you have Alzheimer's, according to experts. Read on—and to ensure your health and the health of others, don't miss these Sure Signs You've Already Had COVID.



Senior woman conducting an interview

Confusion is one of the earliest and most common symptoms of Alzheimer's disease. "If you have a decline in your memory or thinking that affects your ability to perform any of your daily routines, ask your doctor for a screening to evaluate you for Alzheimer's and related conditions," says Dr. Gad Marshall, a Harvard Medical School assistant professor of neurology.


Personality Changes

Elderly couple arguing.

Personality changes could be a symptom of Alzheimer's disease. "Many times, when people develop Alzheimer's disease, their personality traits sort of become exaggerated. So if they're a genuinely nice person and have been quite affable throughout most of their life, that continues into the disease process," says neurologist Dr. Ronald Petersen. "Occasionally, it happens that people do a 180. That is, the nice, little old grandmother throughout her whole life develops the disease and then starts talking like a sailor later on in life using words that she had never used throughout her life."


Trouble Communicating

Mature couple sitting on sofa together and looking to opposite sides.

Language issues—also known as aphasia—are a common sign of Alzheimer's. "Aphasia is a broad term that refers to a problem with language," says neurologist Dr. Hugo Botha. "So, for example, patients with aphasia may have trouble understanding what other people are saying, understanding what they read, or may have trouble putting their thoughts into words. It is not a disease in the sense that something like diabetes is a disease. There are many different diseases that can cause aphasia – for example, stroke or head injuries, or progressive brain diseases, like Alzheimer's disease."


Financial Issues

Surprised senior mature woman counting bills at home.

Forgetting to pay bills or making poor financial decisions could be a sign of Alzheimer's. "We were hearing a lot of anecdotes about patients who didn't even know that they had dementia when some of these adverse financial events were happening," says Lauren Hersch Nicholas of the Johns Hopkins Bloomberg School of Public Health. "Then the whole family might find out when they'd lost a home or a business, or suddenly a new scammer had been added to other accounts and was taking their savings."


Family History

Comforting Senior Husband Suffering With Dementia

People with a family history of Alzheimer's could have an increased risk of developing the disease. "There's a truly inherited form of the disease called familial Alzheimer's disease, early-onset Alzheimer's disease," says Dr. Petersen, explaining that those with the genetic form of Alzheimers have a 50-50 chance of getting it. "The vast majority of the disease is called sporadic, but even in sporadic cases, there can be a familial tendency."

Ferozan Mast
Ferozan Mast is a science, health and wellness writer with a passion for making science and research-backed information accessible to a general audience. Read more about Ferozan