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.

A sentinel headache is a sudden, severe headache that can indicate a medical emergency. Learn about the symptoms, causes, ...

Patients in the early stages of psychosis respond to treatments differently than those who have developed a chronic version ...

A new review highlights growing evidence linking gut health to sleep apnea, suggesting that changes in gut microbiota may influence the severity of sleep-disordered breathing.

When the immune system breaks down, pollutants, toxins and other irritants are allowed into the body. This is more common with the lungs and gut, but such breakdowns happen in the brain too.