Emma Heming-Willis on Coping with COVID Brain Fog
The pandemic may be in our rear-view mirror, but not for everyone. Many people who had COVID—even mild cases—are still struggling with fuzzy thinking, confusion, and trouble concentrating. These neurological issues are called Covid brain fog. It’s one of the most common symptoms in individuals with long COVID, also called COVID long-haulers.
For Emma Heming-Willis—who is the wife of actor Bruce Willis, a model, and founder of CocoBaba skin care products—her struggle with brain fog began after having COVID in the spring of 2022.
“I went through [COVID] fine,” Emma says to Dr. Daniel Amen in an episode of Scan My Brain. “But I came out of it with the worst brain fog that I haven’t been able to shift. It kind of comes in waves, but I have not cleared it at all. I’m constantly in this haze, and it’s scary.”
I went through COVID fine, but I came out of it with the worst brain fog that I haven’t been able to shift. It kind of comes in waves, but I have not cleared it at all. I’m constantly in this haze, and it’s scary. -Emma Heming-Willis
WHAT IS BRAIN FOG?
Brain fog isn’t classified as a medical condition. Instead, it’s a term that is used to refer to symptoms that impact your ability to think clearly. Brain fog symptoms include:- Forgetfulness
- Sluggishness
- Confusion
- Trouble with focus
- Lack of mental clarity
- Mental fatigue
- Distraction
- Slowed thinking
- A sense of overwhelm
BRAIN FOG CAUSES
Brain fog can be caused by a number of medical conditions and other issues. Some of the risk factors for brain fog include:- Long Covid: Brain fog is one of the most common long COVID symptoms, according to a growing number of studies. Estimates on the percentage of COVID long-haulers with brain fog range widely. In a 2022 study in JAMA Open Network, over 45% of people with long COVID reported brain fog or memory issues. Another study published in 2022 in Frontiers in Aging Neuroscience indicates that close to 70% of long COVID sufferers struggle with brain fog or cognitive dysfunction.
- ADD/ADHD: Some brain fog symptoms, such as difficulty concentrating and lack of focus, are also ADD/ADHD Findings in a 2017 study point to elevated levels of cytokines in people with this common condition. This research suggests that increases in cytokines may interfere with working memory, cause a slowing in reaction times, increase the odds of making careless mistakes, and reduce the ability to focus.
- Depression or pseudodementia: Many symptoms of depression overlap with symptoms of brain fog. For example, feeling sluggish, having mental fatigue, and being unable to concentrate are symptoms seen in both of these issues. Pseudodementia is a condition in which symptoms of dementia such as confusion and forgetfulness are due to undiagnosed depression. When the depression is treated, the cognitive dysfunction improves. Brain SPECT scans taken at Amen Clinics on people before and after they had COVID show that the infection can lead to overactivity in the emotional centers of the brain. This increases the likelihood of low moods and depression.
- Stress: Everyday stress can have a negative impact on brain function, resulting in brain fog symptoms. A 2020 study confirms that chronic stress decreases blood flow to the brain, which can lead to impairments in thinking, reasoning, and decision-making.
- Head trauma: Mental fatigue and brain fog are common post-concussion symptoms. According to the Centers for Disease Control and Prevention (CDC), it’s common to experience difficulties with thinking and remembering after a brain injury.
- Grief: Experiencing a significant loss can overwhelm the brain and lead to what some experts call “grief brain.” Symptoms of grief brain mirror many of the same symptoms of brain fog, including trouble focusing, memory issues, and confusion.




