Written by Dr. Savannah Muncy, Pharm.D on
February 20, 2022
Reading Time: 6 minutes

Medically Reviewed by our Medical Affairs Team

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

Have you felt like you can’t think straight? Like your brain is too foggy, and it’s tough to focus on anything lately? If so, you’re not alone. Severe brain fog is a problem that many people experience.

In this blog post, we will discuss the causes of intense brain fog, its symptoms, and its remedies. We hope that this information will be helpful for those who are struggling with this condition.

So, let’s get started.

What exactly is intense brain fog?

Extreme brain fog is a condition of cognitive dysfunction where you can’t focus or concentrate, and your memory becomes impaired.

It’s when you feel like your head is in the clouds all of the time, which makes it difficult for you to think clearly about anything at all.

You might also have trouble with things, such as remembering names and dates.

The causes of intense brain fog can be traced from simple factors, such as not getting enough sleep, to more serious underlying conditions, such as lupus, which attacks both your immune system and central nervous system. 

The cognitive symptoms of serious brain fog can vary from person to person, but generally speaking, the condition will make it hard for you to do things that require thinking and focus. 

If you are experiencing extreme brain fog, it’s important to seek medical advice and get a proper diagnosis.

Remember that intense brain fog is not just about feeling tired, dealing with mental fatigue, or having trouble concentrating for one day but rather an ongoing problem that can make your daily life very challenging.

If the extreme brain fog persists, you should see your doctor as soon as possible so they can help diagnose what exactly is causing this condition.

Extreme brain fog can be treated with medications, such as antidepressants or antianxiety drugs, but you should also make sure that no other underlying conditions are causing your cognitive symptoms before taking them up on these options.

If intense brain fog persists or gets worse over time despite treatment, it might be indicative of a more serious problem.

In such a case, you should seek immediate medical attention.

Common Causes of Severe Brain Fog

There are many different causes of intense brain fog, and it can be due to a variety of factors.

Some of the most common causes of this cognitive dysfunction are:

Hormonal changes

Many women experience brain fog during their menstrual cycle or when they’re pregnant. 

This is because the hormones estrogen and progesterone can affect cognitive function. 

For example, a woman’s body may produce too much estrogen during the first trimester of pregnancy when she’s not yet aware that she is pregnant.

This can lead to extreme brain fog because her brain will be receiving extra amounts of this hormone from outside sources rather than internally producing it itself.  

Other hormonal changes that can trigger brain fog include the onset of puberty and menopause.


Some medications can also cause intense brain fog as a side effect.

This is because many drugs, especially psychiatric medications, affect how your neurotransmitters work in the brain.

For example, antidepressants can often lead to agonizing brain fog as a side-effect.

Another medication that is known to cause this condition is birth control pills.

Poor Nutrition

A poor diet is one of the major contributing factors to extreme brain fog and overall cognitive dysfunction.

This is because your body needs certain nutrients to function correctly, such as vitamins and minerals.

If you’re not getting enough of these essential nutrients in your diet, then it can lead to intense brain fog as well as other health problems.

For example, a lack of vitamin B12 can cause brain fog and lead to cognitive decline over time if left untreated.

Aging is another factor that contributes to increasing brain fog because the body has trouble absorbing nutrients from food sources as you get older. 

Lack of Sleep

Not getting enough sleep is one of the most common causes of brain fog.

This is because when you’re tired, your body isn’t able to function as well as it should, and this can lead to a feeling of being mentally foggy.

In addition, sleep deprivation can also have serious long-term consequences for your health.

Some of these long-term effects include obesity, heart disease, and diabetes.


Chronic stress is another factor that can lead to intense brain fog.

This is because when you’re stressed out, your body releases a hormone called cortisol, which can affect how well you think and concentrate.

For example, when you’re feeling overwhelmed by stress, it can be difficult to focus on anything else but the thing that’s stressing you out.

This is because cortisol takes up a lot of your brain’s energy and resources, leaving little for anything else.

Environmental Factors

There are also some environmental factors that can contribute to extreme brain fog.

This is because our brains are constantly trying to process all the information that we’re taking in from our surroundings.

If there’s too much stimulation or if the environment is overly chaotic, then it can be difficult for your brain to focus, and this can lead to a feeling of being too mentally foggy. 

Some common environmental factors that contribute to intense brain fog include:

  • Noisy environments, such as a busy street corner or the mall.
  • Bright lights and loud sounds can also lead to brain fog because they’re stimulating your senses in ways that may not be beneficial for focusing on the tasks at hand. 
  • A cluttered environment as it creates a sense of chaos and disorganization, which is not conducive for concentrating.

Thyroid Disorders

Thyroid disorders can also be a contributing factor to extreme brain fog.

This is because the thyroid regulates many different processes in your body, including metabolism and energy levels.

If there’s an imbalance of hormones within your glandular system, then it could lead to intense brain fog as well as other symptoms, such as mental fatigue or weight gain.

Heavy Metal Exposure

Heavy metal exposure can also be a contributing factor to extreme brain fog.

This is because heavy metals, such as lead or mercury, are toxic, and they can damage the cells in your brain over time.

As a result, you may experience symptoms like memory loss, difficulty concentrating, and problems with coordination.

If you think that you may be experiencing serious brain fog due to heavy metal exposure, it’s essential to see a doctor right away.

Brain Inflammation

Another potential cause of extreme brain fog is inflammation in the brain.

This can happen for a number of reasons, including infections or autoimmune disorders.

If you have severe inflammation, then it may lead to severe symptoms like memory loss and difficulty concentrating as well as other health problems.

Traumatic Brain Injury

A traumatic brain injury (TBI) is a severe head injury that can cause long-term damage to the brain.

This type of injury can lead to many different symptoms, including extreme brain fog.

If you’ve suffered from a TBI in the past, then it’s important to be aware of the potential long-term effects that it could have on your mental health.

Some common symptoms of a TBI include headaches, dizziness, confusion, and memory problems. 

Medical Conditions

There are also some medical conditions that can cause intense brain fog, such as the following:

If you have one of these health problems, then it’s important to talk with your doctor about how it might be affecting your mental clarity and concentration levels.

Extreme Brain Fog Symptoms

Now that we’ve gone over some of the potential causes of intense brain fog, let’s take a look at some of the most common symptoms.

The following are some signs that you may be experiencing extreme brain fog:

  • Difficulty concentrating or focusing on tasks
  • Feeling overwhelmed and stressed out easily
  • Having trouble remembering things, especially recent events
  • Feeling mentally foggy and groggy for most of the day
  • Difficulty speaking or understanding others clearly
  • Problems with coordination and balance
  • Inability to think logically or rationally 
  • Experiencing mood swings or changes in temperament
  • Feeling excessively tired, drowsy, and fatigued 
  • Difficulty sleeping at night 
  • Experiencing severe headaches or migraines 

If you’re experiencing two or more of these symptoms, then it’s important to talk with your doctor about what might be causing them and the appropriate remedies you can take

Brain Fog Remedies

Now that we’ve gone over intense brain fog symptoms and causes, let’s take a look at some remedies you can use to help improve your mental clarity.

The following are some brain fog treatment options or remedies that you can try easily:

  • Get plenty of restful sleep each night 
  • Make sure to eat nutritious and healthy meals regularly to improve your immune system and overall brain health.
  • Exercise for 30 minutes to an hour each day 
  • Practice meditation and deep breathing exercises daily
  • Take natural supplements that support brain health, such as Omega-three fatty acids, vitamin B12, magnesium, and iron for a healthy supply of red blood cells to the brain.
  • Avoid medications or drugs that can cause extreme brain fog as a side effect, such as stimulants like Adderall
  • Seek treatment for severe health problems, such as diabetes or thyroid disease 
  • Get professional help if you’re depressed, experiencing severe anxiety, or dealing with other mental health conditions.
  • Take a break from stressful situations and activities when possible

If you’re experiencing severe symptoms like memory loss and difficulty concentrating for most days, then it’s important to talk with your doctor about what might be causing them and how they can best be treated.

Concluding Thoughts

By now you should have a good understanding of what intense brain fog is, the potential causes, and the most common symptoms.

You should also have a few ideas about how to treat this condition if you’re experiencing it yourself.

Remember that it’s important to seek professional help if your symptoms are severe or persist for an extended period of time.

If you want to learn more about brain fog and how to treat it effectively, check out these educational articles and feel free to join this online community of brain health professionals and enthusiasts.

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