Harvard Health Letter

Is an underlying condition causing your fuzzy thinking?

Underlying conditions are often overlooked as causes of thinking impairment. Common causes of fuzzy thinking include obstructive sleep apnea, medication side effects, an underactive thyroid, low levels of vitamin B12, or anxiety and depression. Treating an underlying condition can often resolve fuzzy thinking. If not, a visit to a neuropsychologist may be necessary. Other ways to improve clarity include eating a healthy diet, such as the Mediterranean diet; exercising; and getting more sleep.
To continue reading this article, you must login.
  • Research health conditions
  • Check your symptoms
  • Prepare for a doctor's visit or test
  • Find the best treatments and procedures for you
  • Explore options for better nutrition and exercise
Learn more about the many benefits and features of joining Harvard Health Online »