Brain Fog During Perimenopause: What We Know

At a Glance

• Brain fog is a common concern during perimenopause and menopause. It may present as difficulty concentrating, increased forgetfulness, or a feeling that thinking is less clear than it once was.
• While hormonal fluctuations may play a role, sleep, stress, mood, and other factors often contribute as well.
• If symptoms become concerning or begin to affect your daily life, an assessment can help identify possible causes and determine the most appropriate strategies.
• Many women experience these changes during the menopause transition. Understanding what is happening is often the first step toward greater clarity.

Many women seek care because they feel like they are no longer themselves. They forget appointments, struggle to find words during conversations, or have difficulty concentrating at work. Some begin to worry about their cognitive abilities or wonder whether these changes are normal.

These cognitive changes, often described as "brain fog," are commonly reported during perimenopause and menopause. While they can be frustrating and sometimes concerning, they do not usually indicate an underlying neurological disease.

What Is Brain Fog?

The term "brain fog" is not a medical diagnosis. It is commonly used to describe a group of cognitive symptoms that may include:

• Difficulty concentrating
• Feeling less mentally sharp than before
• More frequent forgetfulness
• Difficulty finding words
• Feeling more distracted or disorganized
• Difficulty multitasking

These symptoms can vary from one woman to another and may fluctuate over time.

What Is the Connection with Perimenopause?

Perimenopause is the transitional period during which hormone levels fluctuate significantly before menstrual periods stop permanently.

Estrogen plays a role in several brain functions, including memory, attention, and information processing. As hormone levels become more variable, some women notice changes in their cognitive performance.

However, hormones are likely not the only factor involved.

Several issues commonly associated with perimenopause may also contribute to brain fog, including:

• Sleep disturbances
• Night sweats
• Stress
• Anxiety
• Mood changes
• Chronic fatigue

For many women, these factors occur together and can have a significant impact on daily functioning.

Is It Normal to Be More Forgetful?

Mild cognitive changes are common during the menopause transition.

For example, you may find yourself:

• Forgetting why you entered a room
• Taking longer to find the right word
• Relying more on notes or reminders
• Finding it harder to stay focused for extended periods

Although these symptoms can be unsettling, studies show that the cognitive changes observed during the menopause transition are generally modest and remain within the normal range. Some research also suggests that these difficulties may improve after menopause for many women.

When Should You Seek Medical Advice?

Brain fog deserves attention when it begins to interfere with work, daily responsibilities, or quality of life.

It is also important to seek medical evaluation if symptoms are:

• Significant or progressively worsening
• Accompanied by unusual neurological symptoms
• Causing substantial distress
• Different from what you have experienced before

Several health conditions can also contribute to cognitive difficulties, including sleep disorders, thyroid conditions, anemia, depression, and other medical issues. An evaluation can help identify potential causes and determine appropriate management strategies.

Is There Anything That Can Help?

There is no single solution that works for every woman. However, certain strategies may help support cognitive health during this transition.

Prioritize Sleep

Sleep plays a critical role in memory, attention, and cognitive function. When sleep disturbances are present, addressing them can sometimes lead to meaningful improvements in mental clarity.

Stay Physically Active

Regular physical activity is associated with numerous benefits for brain, cardiovascular, and mental health.

Manage Stress

Chronic stress can affect concentration, attention, and memory. Strategies tailored to your individual circumstances may help reduce this cognitive burden.

Explore Treatment Options

For some women, addressing perimenopause or menopause symptoms may be part of a broader approach to improving quality of life. Available treatment options vary depending on symptoms, medical history, and individual preferences.

Learn More

Brain fog is only one of the many symptoms that can occur during perimenopause. Some women also experience less expected changes and may not immediately recognize that hormonal fluctuations could be contributing to them.

Read our article "Beyond Hot Flashes: Lesser-Known Symptoms of Perimenopause," where we explore other often-overlooked manifestations of this transition, including heart palpitations, itching, restless legs syndrome, and several other symptoms that can affect daily life.

Understanding the wide range of symptoms associated with perimenopause can help you better recognize the changes you may be experiencing and feel more confident discussing them with a healthcare professional.

References and Further Reading

1. Greendale, G. A., Huang, M. H., Wight, R. G., Seeman, T., Luetters, C., Avis, N. E., Goldberg, G., Klein, A. G., & Karlamangla, A. S. (2009). Effects of the menopause transition and hormone use on cognitive performance in midlife women. Neurology, 72(21), 1850–1857. https://doi.org/10.1212/WNL.0b013e3181a71193

2. Greendale, G. A., Wight, R. G., Huang, M. H., Avis, N., Gold, E. B., Joffe, H., Seeman, T., Vuga, M., & Karlamangla, A. S. (2010). Menopause-associated symptoms and cognitive performance: Results from the Study of Women's Health Across the Nation. American Journal of Epidemiology, 171(11), 1214–1224. https://doi.org/10.1093/aje/kwq067

3. Metcalf, C. A., Duffy, K. A., Page, C. E., & Novick, A. M. (2023). Cognitive problems in perimenopause: A review of recent evidence. Current Psychiatry Reports, 25(10), 501–511. https://doi.org/10.1007/s11920-023-01447-3