This can be one of the symptoms of long COVID. Many people experience problems with their cognition after having COVID-19, even long after the initial infection has passed. Examples of such viruses include West Nile virus and COVID-19. Viral infections can also lead to brain fog. For example, bacterial diseases such as Lyme disease can cause brain fog.Ī person can also experience brain fog from a fungal infection after inhaling a substance such as mold. Infectionsīrain fog can be a symptom of an inflammatory infection that attacks the brain. As with fibromyalgia, there is no clear explanation of what CFS does to the brain to cause brain fog symptoms. Scientists do not know exactly how fibromyalgia leads to these types of symptoms.ĬFS, also known as myalgic encephalomyelitis, can result in severe tiredness and problems with thinking. Fibromyalgia and chronic fatigue syndromeįibromyalgia and chronic fatigue syndrome are also inflammatory conditions.įibromyalgia causes pain throughout the body and can affect a person’s concentration and memory. Learn more about how MS affects the brain. However, they can lead to frustration and difficulty completing daily tasks, such as finding house keys or shopping for groceries. These changes are usually mild to moderate and do not affect a person’s ability to live independently. In cases of MS, the inflammation causes gradual damage to the myelin in the brain.Īs a result, people living with MS may experience changes in their ability to make decisions and process and remember information. Migraine is also associated with the inflammation of vessels and tissues in the brain. One theory is that migraine causes cortical depression, which is a change in brain activity that can lead to brain fog. While more research is needed to understand why this happens, many people report experiencing difficulties with cognition before or during a migraine attack. Migraine episodes can also involve other symptoms, such as sensitivity to light and sound, mood changes, and brain fog. Migraine is a condition that can cause recurring headaches, which can sometimes be debilitating. Other signs include headache and mood changes. It can cause acute inflammation in the brain, leading to cognitive brain fog-like symptoms such as memory problems, confusion, or forgetfulness. ConcussionĪ concussion can happen after trauma or a head injury such as a fall. Low-grade inflammation can also occur in a specific organ or tissue, including brain tissue.Ī person can also experience acute inflammation, which can result from a traumatic head injury, for example.īelow are examples of conditions that may cause brain fog, usually due to a type of inflammation. This inflammation can affect the heart and its vessels, the gut and its biome, the liver, as well as the brain’s neurons and cognition. Chronic inflammation is caused by an out-of-balance immune system and can affect any part of the body in different ways. There are different types of inflammation. Many conditions that can cause brain fog are inflammatory conditions.
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