When you notice a change in a parent, spouse, or loved one—more forgetfulness, confusion, or unusual behavior—it’s natural to worry. One of the most common questions we hear from family caregivers is: “Is this normal aging, or could it be Alzheimer’s disease?”
It’s important to remember that memory changes and confusion don’t always mean Alzheimer’s. While they can be early signs of Alzheimer’s or another form of dementia, they can also be caused by other health conditions—some of which are treatable and even reversible.
That’s why it’s so important not to jump to conclusions. If you notice new or worsening changes in your loved one’s memory, mood, or behavior, schedule an appointment with their primary care physician or a geriatric care provider. A medical evaluation can help determine what’s really going on.
6 Health Conditions That Can Mimic Alzheimer’s Disease
When evaluating new cognitive or behavioral changes, a physician may look for several underlying conditions before making a diagnosis of dementia.
1. Urinary Tract Infections (UTIs)
UTIs are common among older adults and can sometimes cause unexpected changes in behavior. Instead of the typical symptoms you might expect, an older adult may experience confusion, disorientation, agitation, or sudden changes in behavior.
Because these symptoms can resemble dementia, it’s important to rule out an infection—especially when the changes appear suddenly.
2. Vitamin B-12 Deficiency
Vitamin B-12 plays an important role in brain and nerve health. A deficiency can contribute to memory problems, confusion, difficulty concentrating, and changes in mood.
Older adults may be more vulnerable to nutritional deficiencies, particularly if they have difficulty preparing balanced meals, have a poor appetite, or have certain medical conditions that affect nutrient absorption.
A simple blood test can help determine whether a B-12 deficiency may be contributing to cognitive changes.
3. Depression
Depression doesn’t always look the same in older adults as it does in younger people. Sometimes, symptoms such as forgetfulness, difficulty concentrating, withdrawal, and lack of motivation may be more noticeable than sadness.
In some cases, depression can cause cognitive symptoms that resemble dementia. This is sometimes referred to as “pseudodementia.” Treating the underlying depression may improve these symptoms.
4. Dehydration
Older adults are particularly vulnerable to dehydration, and it can happen more easily than many families realize.
Even mild dehydration can contribute to confusion, irritability, weakness, and disorientation. The risk increases during hot summer months, but dehydration can occur at any time of year.
Encouraging regular fluid intake and watching for signs of dehydration can help protect your loved one’s overall health.
5. Thyroid Problems
Changes in thyroid function become more common with age. Both an underactive thyroid (hypothyroidism) and an overactive thyroid (hyperthyroidism) can affect how a person feels and functions.
Symptoms may include difficulty concentrating, memory problems, fatigue, mood changes, and confusion—all of which can sometimes be mistaken for dementia.
A physician can check thyroid function with a blood test and determine whether treatment may help.
6. Diabetes and Blood Sugar Changes
Blood sugar levels can have a significant impact on the brain. Both very high and very low blood sugar can cause confusion, agitation, unusual behavior, or difficulty thinking clearly.
For someone with diabetes, sudden changes in behavior or mental status may be related to blood sugar and should be evaluated promptly.
When You Notice a Change, Start With a Conversation
Seeing changes in a loved one can be frightening, but you don’t have to figure out the cause on your own.
New confusion or memory loss deserves attention—especially when the change is sudden or noticeably different from your loved one’s usual behavior. Rather than assuming it’s Alzheimer’s disease, start by talking with their healthcare provider.
A thorough evaluation can help identify whether the symptoms are related to an underlying, treatable condition or may be signs of dementia.
And if your loved one is ultimately diagnosed with Alzheimer’s disease, there is still hope. Today, there are treatments and medications that may help manage symptoms or, for some people, slow the progression of the disease. Early evaluation and diagnosis can help families better understand their options and plan for the care their loved one needs.
When it comes to changes in memory and behavior, don’t guess—get answers. Your loved one’s healthcare provider can help you understand what’s happening and determine the best next steps.
