Brain fog is one of the most common symptoms of many chronic illnesses, including lupus, multiple sclerosis and fibromyalgia. In this Mind Over Meniere’s video, Glenn describes how brain fog affects him on a daily basis.

MORE: One fibromyalgia patient shares how the condition disrupts her daily routine

Brain fog is more than just the occasional forgetfulness that most people suffer from. It is a cognitive impairment that can affect conversation, short-term memory, and the ability to concentrate and focus.

Glenn explains that very few people know about brain fog since it’s an invisible symptom. He hopes that his videos will help the public realize how common it is for people with chronic illnesses to suffer from brain fog and how those who suffer from it will require patience and understanding.

MORE: Our resident columnist, Robin Dix, writes about conditions fibromyalgia patients often suffer from

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