Written by Dr. Savannah Muncy, Pharm.D on
November 17, 2022
Reading Time: 7 minutes

Medically Reviewed by our Medical Affairs Team

Written by Dr. Savannah Muncy, Pharm.D on:

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Do you feel like you can’t think straight during your period? You’re not alone.

Other than dealing with heavy blood flow, many women experience brain fog and other symptoms during their menstrual cycle. This can be a really difficult time for many people, both mentally and physically.

In this article, we’ll discuss what period brain fog is, why it happens, and how to deal with it. We’ll also offer some tips for maintaining your brain health throughout your cycle.

Let’s get started.

What is period brain fog, exactly?

Period brain fog is a term used to describe the mental effects some people experience during their menstrual cycle. It can manifest itself in different ways, including confusion, forgetfulness, and poor concentration.

Brain fog is thought to be caused by changes in hormones that occur during your period. These hormone fluctuations can interfere with brain activity and lead to feelings of exhaustion, confusion, and irritability.

Brain fog during your menstrual cycle can also occur a few days before and after your period, at which point your hormone levels are still changing.

Common Causes of Brain Fog During Period

Brain fog can be caused by several factors, and here are some of the common ones:

Hormonal Imbalance

As previously mentioned, hormonal imbalances during your period can affect brain activity and lead to brain fog. This can be caused by an increase in estrogen or a decrease in progesterone levels in the body.

Estrogen is known to have an effect on the hippocampus, which is a part of the brain that plays a role in memory and cognition. It can also interfere with your ability to focus or concentrate.

Progesterone, on the other hand, affects the release of dopamine, which is a neurotransmitter that helps regulate mood, especially mental and physical energy. A decrease in this hormone can lead to feelings of fatigue and confusion.


High-stress levels can also interfere with brain function and cause you to feel foggy during your menstrual cycle. Stress is thought to play a role in hormone fluctuations, which can lead to brain fog.

Additionally, stress can cause your body to produce more cortisol, a hormone that affects the way you think and feel. Too much cortisol can lead to symptoms like difficulty concentrating and feeling overwhelmed.

Nutrition Deficiencies

If you’re not getting enough nutrients in your diet, it could be affecting your brain health. Certain vitamins and minerals are essential for proper brain function, including vitamin B12, omega-3 fatty acids, iron, and magnesium.

A deficiency in any of these nutrients can lead to fatigue, low energy, and confusion.


Anemia is a condition that occurs when your body doesn’t have enough healthy red blood cells to carry oxygen throughout the body. It can cause symptoms like exhaustion, dizziness, and difficulty concentrating.

If you’re noticing any of these symptoms during your period, it’s best to speak with your doctor about getting tested for anemia.

Poor sleep or insomnia

Getting enough sleep is essential for brain health. Poor sleep or insomnia can lead to fatigue and difficulty concentrating, which can make the symptoms of your brain fog period worse.

If you’re having trouble sleeping during your menstrual cycle, it’s best to talk to your doctor about ways to get better rest.

Anxiety and depression

Anxiety and depression can also play a role in your brain fog period. Both anxiety and depression can affect the way your brain functions, leading to feelings of confusion, forgetfulness, and difficulty concentrating.

If you think that you may be suffering from depression and anxiety or any sort of mental health issues, it is essential to consult a professional to help you tailor coping strategies that meet your needs and lifestyle.


Certain medications can also cause brain fog as a side effect. This includes antidepressants, antihistamines, and even birth control pills.

If you think that your medication is causing brain fog, it’s best to speak with your doctor about adjusting the dosage or exploring alternative treatments.

Other PMS symptoms

Brain fog can often be accompanied by other premenstrual syndrome (PMS) symptoms, like acne, bloating, mood swings, and food cravings.

The premenstrual syndrome occurs in the days before your period and is caused by hormone fluctuations. The symptoms can vary from person to person, but they often go away after your period starts.

Although these symptoms are normal and vary from person to person, if they become severe, it’s best to speak with your doctor about ways to manage them.

Getting brain fog after your period

Brain fog can also occur after your period ends. This is usually due to the fluctuations in hormones that occur in the days or weeks following a menstrual cycle.

To help manage brain fog post-period, it’s important to focus on maintaining good sleep hygiene, eating a balanced diet, and getting regular exercise.

Additionally, stress management techniques like meditation and yoga can help reduce symptoms.

It’s also important to speak with a doctor if symptoms persist or become severe, as they could be signs of an underlying medical condition.

Common Symptoms of Brain Fog Period

Brain fog during your period can cause a variety of symptoms, including:

  • Fatigue
  • Trouble concentrating or focusing
  • Memory problems
  • General confusion
  • Difficulty making decisions
  • Trouble with problem-solving
  • Irritability or sudden mood swings
  • Feeling overwhelmed.

If you’re experiencing any of these symptoms during your period, it’s essential to talk to your doctor about finding ways to manage them.

How Hormones Impact the Brain

Hormones like estrogen, progesterone, and testosterone play a major role in brain health.

Estrogen can affect cognitive performance by helping the brain create new nerve cells and improving communication between neurons.

Progesterone is important for controlling cortisol levels, which helps regulate stress response hormones.

And testosterone plays a role in regulating dopamine, which is a neurotransmitter associated with mood, focus, and motivation.

When these hormones are out of balance during your period, they can lead to brain fog symptoms like fatigue, confusion, and inattention.

Menstrual Cycle Hormones and Brain Health

The menstrual cycle is divided into two parts: the follicular phase and the luteal phase.

During the follicular phase, estrogen levels rise as an egg develops in the ovary. This increase in estrogen can improve your ability to concentrate, focus, and remember things.

In contrast, during the luteal phase, progesterone and testosterone levels drop. This can lead to an increase in brain fog symptoms like fatigue and confusion.

How to Get Rid of Period Brain Fog

There are a few steps that you can take to help manage brain fog during your period; here are some of the most effective practices, according to research:

Optimize your sleep.

Optimizing your sleeping habits and patterns can make a huge difference when it comes to your PMS or during your period. 

Most people have trouble sleeping at the peak of their menstrual cycle, so here are some tips you can implement to ensure that you optimize your sleep:

  • Do your best to go to bed at the same time every night and wake up at the same time daily.
  • Avoid caffeine and stimulants before bed.
  • Refrain from eating heavy meals a few hours leading to bedtime.
  • Create a relaxing nighttime routine, such as reading, stretching, taking a warm bath, or meditating.

Eat nutritious meals.

Eating a balanced diet is essential for overall health, but also for brain fog management during your period.

Foods like whole grains, lean protein, fruits, and vegetables are packed with essential nutrients that can help support healthy brain function.

Focus on reducing sugar intake as much as possible—sugary foods tend to lead to inflammation, mood swings, and fatigue.

Get enough essential fatty acids. Essential fatty acids (EFAs) like omega-3s are important for brain health.

These EFAs can help reduce inflammation and support healthy neurotransmitter production, which can lead to improved concentration and focus during your period.

You can get these EFAs from foods like salmon, mackerel, walnuts, and flaxseeds, or you can take a supplement.

Keep your blood sugar balanced.

Blood sugar regulation is essential for reducing brain fog symptoms during your period.

In order to keep blood sugar levels balanced, make sure to eat regularly spaced meals and snacks throughout the day and focus on eating foods rich in fibers and complex carbohydrates, such as:

  • Whole grains: brown rice, unprocessed grains, barley, oats, and quinoa.
  • Legumes: black-eyed peas, lentils, kidney beans, and black beans.
  • Vegetables: asparagus, carrots, sweet potatoes, green beans, broccoli.
  • Fruits: kiwi, apples, oranges, berries.

Manage your stress levels.

Stress is one of the most common triggers of brain fog.

To help manage your stress levels, make sure to practice relaxation techniques like mindful breathing and meditation.

You can also do things like take a warm bath, go for a walk outside, spend time in nature, practice yoga or get a relaxing full-body massage.

Exercise regularly, especially when you’re not on your period.

Regular exercise can help you reduce brain fog symptoms at any time of the month.

Make sure to include both aerobic and strength-training exercises in your workout routine, as well as stretching and mobility work — this will help keep your body strong and flexible while improving blood flow throughout your body.

Stay hydrated.

It’s important to stay hydrated, especially during your period.

Drink water throughout the day to help keep your brain and your body well hydrated. 

You can also try drinking herbal teas such as chamomile or peppermint tea to help relax your body and mind while getting hydrated.

Sharpen your mind proactively.

Brain training activities like puzzles and crosswords can help improve your brain health in the long run.

Other brain-training activities you can try include: 

  • Reading books
  • Listening to podcasts or audio-books
  • Writing in a journal
  • Playing board games with friends or family
  • Doing online brain training activities.

These activities keep your mind active and engaged, which can help reduce the chances of brain fog during your period.

Get enough rest during the day.

Aim to get at least 7-9 hours of sleep every night.

If you find yourself feeling more tired than usual during your period, make sure to take regular naps or rest breaks throughout the day.

This will give your body and mind a chance to recharge and can help reduce brain fog symptoms during your period.

Plan your period ahead.

If possible, try to plan ahead for your period.

This will help you be prepared for any brain fog symptoms that may come up and give you a chance to take steps to manage them.

Take note of any patterns or triggers that could be causing your brain fog and make a plan on how to best address them.

Seek professional help if necessary.

If the brain fog persists despite trying the tips above, it may be a good idea to seek medical or psychological advice from a healthcare practitioner.

They can help you determine the underlying cause of your brain fog and provide you with further treatment recommendations.

Wrapping Up

Dealing with period brain fog can be frustrating and, sometimes, debilitating, especially for people who suffer from premenstrual dysphoric disorder (PMDD), which is characterized by severe emotional and physical symptoms in the days before your period.

However, there are steps you can take to help manage brain fog during your period, such as the ones we listed in this article.

If you experience brain fog with or without your period and you’re looking for natural strategies to improve your overall brain function in the long run, check out these helpful resources in our blog. 

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