Scientists have long struggled to define brain fog—let alone pinpoint a cause for it. But research is starting to reveal multiple potential causes from inflammation to a leaky blood-brain barrier.

Brain fog makes you feel like you can't think straight, focus, or stay completely alert. Sleep deprivation can cause fogginess because it makes your brain go into sleep-like rhythms. Brain fog can ...

But what causes it? The National Weather Service ... the humidity will reach 100% and fog will form. "Fog is just basically a cloud at the surface, and we tend to see it quite a bit this time ...

For many people, the pressure of the pandemic has also manifested in the form of ... is the cause. On top of identifying and trying to avoid whatever is causing your brain fog, Harper says ...