Brain Fog

Key Takeaways:

• Brain fog is a common experience that involves impairments in thinking, memory, or other cognitive abilities. Many people describe it as a sense of mental “haziness” or “cloudiness”.

• There are numerous possible causes of brain fog, including mental and physical health conditions, infections, medication side effects, and lifestyle factors (e.g., sleep deprivation).

• Mild cases of brain fog often go away on their own, but chronic cases often require treatment. The only way to treat brain fog is to identify and treat the underlying cause(s).

Understanding Brain Fog

Brain fog is a general term used to describe impairments in thinking, memory, or other cognitive abilities. People with brain fog may also feel that their thoughts are slowing down or feel a sense of confusion.^[1]

It’s important to understand that brain fog is different from the normal cognitive decline experienced from aging.

Brain fog can be caused by specific illnesses or conditions, although it sometimes may not have a clear cause. Some people may experience only mild, short-term episodes of brain fog, while others may deal with more severe or chronic brain fog.^[1][2]

How Common is It?

Brain fog is relatively common, with a prevalence rate of over 28% in the general adult population.^[1]

Causes of Brain Fog

There are many possible causes of brain fog. This includes certain illnesses, injuries, and disorders, as well as more benign causes, such as stress and other lifestyle factors. Sometimes, it can be difficult to determine the exact cause of brain fog.

The possible mechanisms behind these causes are not completely known, but it may result from various factors, such as:^[1][2][3]

• Increased stress hormones.

• Brain inflammation.

• Nutrient deficiencies.

• Altered levels of neurotransmitters.

• Disrupted nerve and brain cell communication.

Physical Causes

There are a variety of physical causes of brain fog. The following illnesses, injuries, and diseases have been shown to possibly cause brain fog:^{[1][2][3][4][5]}

• COVID-19 (especially long COVID).

• Kidney dysfunction.

• HIV.

• Other viral infections.

• Hepatitis.

• Fibromyalgia.

• Cancer (and the resulting chemotherapy).

• Multiple sclerosis.

• Parkinson’s disease.

• Stroke.

• Menopause.

• Chronic fatigue syndrome (CFS).

• Chronic pain.

• Traumatic brain injury (TBI).

Brain fog may also be caused by nutritional deficiencies from an unhealthy or overly restrictive diet. In addition, a variety of prescription or over-the-counter medications may cause brain fog, such as certain antihistamines, sleep aids, or antidepressants.^[4]

Mental Health Causes

Several mental health conditions or other issues may lead to brain fog symptoms, such as:^[4][5]

• Anxiety.

• Depression.

• Chronic stress/burnout.

• Sleep deprivation (esp. from insomnia or other sleep disorders).

• Certain neurodivergent conditions (e.g., ADHD, autism).

Symptoms of Brain Fog

Despite the many possible causes of brain fog, the symptoms are often very similar. Listed below are some of the most common brain fog symptoms:^[1][2][3][4]

• Slowing down of thoughts.

• Trouble concentrating.

• Mental fogginess or haziness.

• Confusion.

• Difficulty following conversation.

• Difficulty following directions or instructions.

• Problems with memory and remembering information.

• Difficulty with multitasking.

• Mental fatigue.

• Decreased ability to pay attention.

• Trouble processing information.

What Does Brain Fog Feel Like?

The subjective experiences of brain fog may feel slightly different from person to person. In general, brain fog feels like a sense of mental haziness, which is felt right within the head. You may feel that you can’t think as clearly or sharply as normal.^[1][4]

You may also experience physical symptoms, such as headache, fatigue, difficulty focusing your eyes, or light or sound sensitivity.^[4]

Brain Fog as a Symptom of Depression

Depression can often cause feelings of brain fog. Examples of brain fog symptoms within depression include loss of mental clarity, poor concentration, difficulty making decisions, and mental fatigue.^[2]

How to Get Rid of Brain Fog

There isn’t one specific way to get rid of brain fog, since it has many causes. Thus, the only way to get rid of brain fog is to get treated for whatever is causing it. In many cases, this means consulting with your doctor. They will ask about your symptoms and likely perform a physical exam and other tests that they deem necessary to find the possible causes.

There are also many things you can do on your own that may help get rid of brain fog or prevent it from occurring, especially for milder cases. This includes:^[1][3][4][6]

• Regular exercise.

• Adequate sleep.

• A healthy, nutrient-rich diet.

• Brain training exercises and activities (e.g., chess, puzzles, crosswords).

• Mindfulness and other stress management practices.

• Limiting alcohol and caffeine intake.

How Long Does Brain Fog Last?

The length of time that brain fog lasts can vary considerably from person to person. Some people may experience mild brain fog that lasts only a few hours to a couple of days, often due to situational factors, such as poor sleep or alcohol intake the night before. However, some individuals may experience chronic brain fog, which can last years or even decades in the most severe cases, causing significant disruptions to life quality and well-being.^[1]

Getting Help for Mental Health Conditions that are Causing Brain Fog

If you suspect that your brain fog is caused by depression, anxiety, or another mental health condition, it’s important to seek treatment from a mental health professional. They will perform a comprehensive mental health evaluation to determine what issues are present and generate a specific treatment plan.

Treatment may include therapy, such as cognitive behavioral therapy (CBT), which helps to address mental health symptoms, along with any frustrations that may occur from dealing with brain fog. They may also incorporate certain medications, such as antidepressants, if deemed necessary.^[5]

When to Contact a Healthcare Professional

Many cases of brain fog are temporary and relatively mild. However, if you’re experiencing significant, long-lasting brain fog that is negatively impacting your well-being and ability to function in key life areas (such as work, school, or daily living), it’s best to contact a healthcare professional.

Takeaway

Nearly everyone experiences brain fog at some point in their lives. But for some people, it can become a chronic, significantly disruptive symptom. If you’re concerned about your brain fog symptoms and how they’re impacting your life, reach out to your doctor or other trusted healthcare professional. They can help determine the causes of your brain fog and implement the best treatment and management plan.