Brain fog, or fibro fog, is one of several fibromyalgia symptoms, according to Healthline. In addition to a feeling of haziness, some fibromyalgia patients may experience symptoms such as forgetfulness, memory problems, confusion and difficulty concentrating.
Fibromyalgia is a musculoskeletal condition that increases the sensation of pain and occurs due to how pain signals are processed by the brain, explains Mayo Clinic. Symptoms can vary widely from benign to intense, but once they appear, excessive stimulation and stress, inadequate sleep and some medications can cause them to become worse, notes Healthline. Treatment generally involves managing fatigue-related symptoms by napping, reducing stress, taking periodic breaks from daily activities and taking certain medications, explains WebMD.