I Think I'm Losing My Memory. Now What?

If you've found yourself here, there's a good chance you've asked Google a question that feels too frightening to say out loud.

"Why am I forgetting things?"
"Do I have Alzheimer's disease?"
"Is this normal?"

Those are understandable questions. Memory changes can be unsettling, particularly if you've watched a parent, grandparent, or close friend develop dementia. It's natural for your mind to jump to the worst-case scenario, but memory problems are not the same thing as Alzheimer's disease.

The good news is that memory concerns are common, and Alzheimer's disease is only one possible explanation. Many people who seek evaluation for memory changes ultimately have something else contributing to their symptoms, including sleep problems, medication effects, mood changes, vitamin deficiencies, thyroid disease, alcohol use, hearing loss, or other medical conditions. That doesn't mean symptoms should be ignored. It means they deserve a thoughtful evaluation rather than an immediate assumption.^1,2

Over the years, I've had the privilege of caring for patients with cognitive concerns. One lesson I've learned is that memory changes deserve thoughtful evaluation rather than immediate conclusions. One of the first questions I ask is whether there has been a meaningful change from that person's usual level of functioning. That distinction matters because not every lapse in memory reflects disease, and not every disease affecting memory is Alzheimer's disease.

Start with a different question

Most people begin by asking, "Am I getting Alzheimer's disease?" While that's understandable, it's not actually where the evaluation starts. A better question is whether your memory or thinking has changed compared with six months or a year ago.

Everyone forgets things occasionally. We misplace our keys, struggle to remember a name, or walk into a room only to forget why we went there. Our brains aren't designed to retain every detail of every day. In fact, forgetting information that isn't important is one of the ways a healthy brain stays efficient.

What concerns clinicians is not an isolated episode of forgetfulness, but a noticeable change over time. Perhaps you're relying on reminders much more than you used to, repeating questions without realizing it, struggling to keep track of appointments, or having difficulty managing tasks that were once routine. Those changes deserve attention because they suggest something more than ordinary lapses in memory.

At the same time, many people notice that their thinking feels "off" without having significant memory loss. They may describe feeling mentally slower, distracted, overwhelmed, or unable to concentrate. Those symptoms are just as real, but they often point us toward different causes than a progressive neurodegenerative disease.

Memory problems are not always caused by dementia

One of the most reassuring parts of a memory evaluation is discovering how many medical conditions can affect thinking. Sleep disorders, depression, anxiety, medication side effects, thyroid disease, vitamin deficiencies, hearing loss, alcohol use, menopause, chronic pain, and other medical illnesses can all contribute to cognitive symptoms. Some are temporary. Others require ongoing treatment. Many improve once the underlying problem is recognized.^1,2

Stress deserves special mention because it affects nearly everyone at some point. Patients frequently tell me they feel like they're becoming forgetful during particularly stressful periods of life. In many cases, what's actually happening is that stress interferes with attention. If your brain isn't fully focused when information is presented, it never has the opportunity to store that information effectively. What feels like a memory problem may actually begin as an attention problem.

That doesn't mean stress should be used as a convenient explanation for every cognitive complaint. Clinicians should be cautious about dismissing symptoms too quickly, particularly when they represent a clear change from someone's usual abilities. A thorough evaluation considers the whole person rather than settling on the first plausible explanation.

Normal aging is real—but so is mild cognitive impairment

Growing older does change the way our brains process information. Many healthy adults notice that learning something new takes a little longer than it once did, or that names don't come quite as quickly. Those changes can be frustrating, but they generally don't interfere with independent living.¹

Dementia is different because it affects daily function. People may begin having difficulty paying bills, managing medications, following familiar recipes, keeping appointments, or navigating places they've known for years. These changes gradually interfere with the ability to function independently.

Between normal aging and dementia is a condition called mild cognitive impairment, or MCI. Individuals with MCI have measurable changes in cognitive function that are greater than expected for age, yet they remain largely independent in their daily activities. Some will eventually develop dementia, while others remain stable for years. Some improve after an underlying cause is identified and treated.^1,3

That uncertainty is one reason why today's diagnostic tools have generated so much interest. Alzheimer's disease can now be evaluated not only by symptoms, but also by biomarkers that reflect underlying disease biology. This is a major shift in the field, but it does not mean every person with forgetfulness needs advanced testing.^3,4

What should happen during a memory evaluation?

A good memory evaluation should not begin and end with a quick screening test. Cognitive screening can be helpful, but it is only one part of the picture. A thoughtful evaluation usually includes a careful history, medication review, discussion of mood and sleep, assessment of daily function, cognitive testing, laboratory studies, and, when appropriate, brain imaging.²

The history matters because the pattern of symptoms often tells us where to look next. A person who repeats the same question several times in one day may need a different evaluation than someone who feels mentally foggy after months of poor sleep. A person who is suddenly confused needs a different workup than someone with slow, progressive changes over several years.

Laboratory testing is often used to look for medical problems that can contribute to cognitive symptoms, such as thyroid disease or vitamin deficiencies. Brain imaging may be ordered to look for strokes, tumors, normal pressure hydrocephalus, significant vascular disease, or patterns of atrophy. Neuropsychological testing may be helpful when symptoms are subtle, the diagnosis is unclear, or a more detailed understanding of cognitive strengths and weaknesses is needed.²

What about blood tests for Alzheimer's disease?

Blood-based biomarkers are one of the most important advances in Alzheimer's diagnosis, especially tests involving phosphorylated tau, amyloid, or related biomarker patterns. At this time, blood-based biomarkers should not be viewed as routine population screening tests like cholesterol or blood glucose testing. They are diagnostic tools used to answer a specific clinical question in people with cognitive symptoms or objective impairment. That may change. As disease-modifying therapies continue to evolve and our understanding of Alzheimer's disease biology advances, earlier identification may become increasingly valuable. For now, however, these tests are most powerful when they're ordered for the right patient, at the right time, and interpreted within the context of a thoughtful clinical evaluation.⁵

The Alzheimer's Association's 2025 clinical practice guideline supports the use of certain blood-based biomarkers in the diagnostic workup of people with suspected Alzheimer's disease within specialized care settings, when test performance meets specific standards. The key point is context. A blood test result should be interpreted alongside the person's symptoms, cognitive testing, medical history, and other clinical information.⁵

This is where patients can easily get misled. A positive biomarker may suggest Alzheimer's disease biology is present, but it does not automatically explain every symptom a person is having. A negative result may make Alzheimer's disease less likely, depending on the test, but it does not mean nothing is wrong. These tests are powerful, but they are not magic. They help clinicians answer better questions when the right question is being asked.

A good evaluation doesn't rely on a single blood test, MRI, or cognitive screening. It brings together the story, the examination, the testing, and the person's day-to-day function. That's how diagnoses become clearer.

What can you do while you're waiting for an evaluation?

Waiting for a clinic appointment can feel uncomfortable when you're worried about memory. There are steps worth taking in the meantime.

• Optimize sleep — fragmented or insufficient sleep is one of the most common and reversible contributors to cognitive symptoms.
• Stay physically active.
• Review every medication — including over-the-counter products, supplements, and sleep aids — with your clinician or pharmacist. Some medications affect cognition more than people realize.
• Have your hearing checked if you've noticed difficulty following conversations. Untreated hearing loss is a meaningful risk factor for cognitive decline and is frequently overlooked.
• Manage blood pressure, diabetes, and cholesterol. Vascular risk factors matter for brain health.
• Write down specific examples of your symptoms rather than relying on general impressions. Notes that describe what is actually happening — and when — are far more useful at an appointment than a general statement of concern.

So what should you do if you're worried?

If you're noticing a change in your memory or thinking, start by writing down specific examples. Not just "I'm forgetful," but what is actually happening. Are you repeating yourself? Missing appointments? Forgetting conversations? Struggling with work tasks? Losing track of bills or medications? Getting lost while driving? Or do you mostly feel distracted, foggy, tired, or overwhelmed?

Bring those examples to your clinician. Bring a medication list. If someone close to you has noticed changes, consider asking them to come with you or write down what they've observed. Memory concerns are often easier to evaluate when we understand how symptoms are affecting real life.

The goal is not to panic, and it is not to talk yourself out of being evaluated. The goal is to take the concern seriously enough to investigate it properly. Sometimes the answer is reassuring. Sometimes it identifies something treatable. Sometimes it leads to an earlier diagnosis of a neurodegenerative disease, which can open the door to planning, support, treatment discussions, and clinical trial opportunities.

Memory changes deserve thoughtful evaluation. Sometimes the explanation is reassuring. Sometimes it identifies a treatable condition. Sometimes it leads to a diagnosis of a neurodegenerative disease. Whatever the answer, understanding what's happening is almost always better than wondering.

References

1. National Institute on Aging. Memory problems, forgetfulness, and aging. Updated November 22, 2023. Accessed June 24, 2026. https://www.nia.nih.gov/health/memory-loss-and-forgetfulness/memory-problems-forgetfulness-and-aging
2. Atri A, Dickerson BC, Clevenger C, et al. Alzheimer's Association clinical practice guideline for the Diagnostic Evaluation, Testing, Counseling, and Disclosure of Suspected Alzheimer's Disease and Related Disorders (DETeCD-ADRD): executive summary of recommendations for primary care. Alzheimers Dement. 2025;21(6):e14333. doi:10.1002/alz.14333
3. Jack CR Jr, Andrews JS, Beach TG, et al. Revised criteria for diagnosis and staging of Alzheimer's disease: Alzheimer's Association Workgroup. Alzheimers Dement. 2024;20(8):5143-5169. doi:10.1002/alz.13859
4. Livingston G, Huntley J, Liu KY, et al. Dementia prevention, intervention, and care: 2024 report of the Lancet standing Commission. Lancet. 2024;404(10452):572-628. doi:10.1016/S0140-6736(24)01296-0
5. Palmqvist S, Whitson HE, Allen LA, et al. Alzheimer's Association Clinical Practice Guideline on the use of blood-based biomarkers in the diagnostic workup of suspected Alzheimer's disease within specialized care settings. Alzheimers Dement. 2025;21(7):e70535. doi:10.1002/alz.70535