What Is Brain Fog offers a brain-fog wiki to help readers explore possible causes

LIVERMORE, California — What Is Brain Fog (https://whatisbrainfog.com/) is an online wiki of guides for people trying to understand brain fog and explore possible causes. Brain fog can mean trouble concentrating, remembering, finding words or thinking clearly. It describes symptoms rather than one condition.

Readers can take a doctor-made test with up to 13 questions. Their answers filter the guides to possible causes and contributors to brain fog, helping them choose what to read about first. They can also browse cause guides by category or search the directory by condition, symptom or situation. Someone searching for “wake up exhausted,” for example, can look at related guides without first knowing the name of a condition. The test and search results guide further reading; they do not medically rule out a cause.

The cause directory (https://whatisbrainfog.com/causes/) covers topics including sleep problems, hormone changes, infections, medicines and pain. Its entries give a short explanation, show what the evidence supports and where its limits are, and link to sources. Examples include:

• Long COVID / ME/CFS: https://whatisbrainfog.com/causes/covid-brain-fog/

• Fibromyalgia: https://whatisbrainfog.com/causes/fibromyalgia/

• Menopause: https://whatisbrainfog.com/causes/menopause/

The site also explains medical tests and offers printable doctor handouts. Before an appointment, a reader can choose a condition, open its handout and print it to take along. Readers can find the handout directory in the site's “Talk to your doctor” section.

Fog Mode, an extension for desktop Chrome, offers tools to remove clutter from articles, adjust text and save a place to return to; details and installation are at https://whatisbrainfog.com/fog-mode/.

The What Is Brain Fog team welcomes feedback about anything unclear, missing or incorrect. Readers and organizations can send feedback and media enquiries to hello@whatisbrainfog.com.