Brain fog – what is it, symptoms, correlation with Covid-19

Patients describe this condition as difficulty concentrating, difficulty expressing themselves, forgetting words, fatigue, and drowsiness. Brain fog, also known as "mental fog," was rarely discussed before the coronavirus. The problem intensified several months into the pandemic, when the first recoveries began to emerge.

What is brain fog? Is it a disease?

Brain fog , or "clouding of consciousness," doesn't occur as a standalone condition but can develop as a consequence of various medical conditions. It's a condition that can affect brain function, causing a range of cognitive problems. The most commonly cited conditions causing brain fog include Lyme disease, anxiety disorders, hypothyroidism, and autoimmune diseases such as Hashimoto's or celiac disease. Brain fog also appears after recovering from Covid-19, which is why this condition has become more widely known since the coronavirus pandemic.

What are the symptoms of mental fog?

By definition, brain fog is a set of symptoms characteristic of disorders in the functioning of the nervous system. Serotonin, dopamine, acetylcholine, and gamma-aminobutyric acid are neurotransmitters whose function is to transmit signals between nervous system cells. When these neurotransmitters are disrupted, for example, due to stress, chronic fatigue, insufficient sleep, dehydration, or poor physical activity and oxygenation, brain fog can occur.

Brain fog is a condition that can affect brain function, causing a range of cognitive problems. Symptoms typically experienced by patients include difficulty concentrating, memory impairment, excessive fatigue during mental tasks, word distortion, chronic fatigue and weakness, and drowsiness. While these symptoms are usually transient, they can persist. To diagnose brain fog, a doctor may recommend tests to assess brain function. Diagnosing the problem may require the involvement of several specialists.

Post-Covid-19 Brain Fog Is What It Is

Brain fog, a complication of coronavirus, often presents with delayed symptoms. It usually appears about three months after infection. It's likely that post-COVID-19 brain fog is a consequence of ongoing inflammation and an overreaction of the immune system.

Young, professionally active people living under high stress are most at risk of these neurological complications, as are patients with comorbidities, strokes, brain injuries, or Alzheimer's disease. It also doesn't matter whether the patient has had a severe case of Covid-19 or only minor symptoms. In both cases, complications can persist for a long time.

How to deal with brain fog?

No cure has yet been developed to effectively treat this condition. However, the problem has become so widespread that it has spawned numerous support groups on social media for those struggling with brain fog. Combating it is challenging because the condition can have many causes, and the diagnostic process is broad. It involves assessing the patient's mental and neurological condition and ruling out internal diseases, including hormonal imbalances, anemia, vitamin and mineral deficiencies (e.g., vitamin D, iron), and electrolyte imbalances. Treatment depends on the diagnosis, ranging from correcting laboratory abnormalities, to a healthy diet, supplementing with B vitamins, and recommending mentally stimulating exercises, adequate sleep, and finally, psychotherapy.

Mental condition of patients after COVID-19

Brain fog resulting from coronavirus infection is usually a temporary condition. However, there can be many causes, and impaired concentration, short-term memory, and disorientation can persist or appear periodically for several weeks, months, or even years. This is why it's crucial to consult a neurologist. A decline in quality of life can negatively impact your mental health, and you shouldn't be left alone to deal with this, especially if you experience anxiety, depression, or even post-traumatic stress disorder. In such cases, it's worth taking care of your mental health and seeking the help of a psychotherapist.

Brain fog is a complex phenomenon that requires a holistic approach to brain health, both in terms of treatment and prevention. Covid-19, chronic illnesses, and unhealthy lifestyles can all have long-term health consequences. Persistent or recurring brain fog significantly reduces the quality of daily life. Therefore, to alleviate its symptoms, healthy lifestyle changes are currently recommended. Remember, you can always seek professional advice.

Medical consultation
with Dorota Korzeb, MD,
neurology specialist