What is a Relapse?

The definition of an MS relapse (or exacerbation) is the sudden onset of new symptoms or worsened symptoms that last for more than 24 hours and is separated from a previous relapse by at least 30 days.  It can be very mild or severe enough to interfere with a person’s ability to function at home and at work. No two exacerbations are alike, and symptoms vary from person to person and often from one relapse to another.  A relapse results from inflammation in the central...