4 Brain Fog Basics
- It's common. About half the people with MS have these issues at some point, says Rosalind Kalb, PhD, a clinical psychologist and vice president of clinical care at the National Multiple Sclerosis Society. For most, the cloudy thinking is mild and manageable. Only 5% to 10% of people with MS have issues with their thinking that seriously affect their day-to-day life or career.
- It can affect your short-term memory, attention, and concentration. It can muck up your ability to retain new information and plan.But it doesn't usually affect your intelligence, reading comprehension, or long-term memory.
- It may get worse over time, but it may not. Once you have episodes of brain fog, they usually don't go away completely. They are more likely to progress slowly.
- It can have many causes. Sometimes the fog is triggered by actual changes in the brain caused by MS. But it can also be brought on by other issues -- like depression, fatigue, and side effects from medication.