Overview & Facts

Multiple sclerosis is a mysterious, often frustrating disease. Learn what scientists know about MS -- what seems to trigger it, and its effect on the nervous system.

What is Multiple Sclerosis (MS)? What makes the body’s immune system cause damage to healthy nerves? Learn more about MS and its effect on the brain and spinal cord.
Could You Have MS? Maybe you’ve felt exhausted or weak lately. Or your foot is starting to tingle. So you do a quick Internet search and come up with an alarming result: Your symptom is one of the signs of multiple sclerosis (MS), a disease of the brain and spinal cord. Before you start to worry, know that many signs of the condition are the same as symptoms of other health problems.
MS and ALS: What's the Difference? Multiple sclerosis (MS) and amyotrophic lateral sclerosis (ALS) are different diseases with some similar features and symptoms.
How MS Progresses The pattern of multiple sclerosis varies from person to person. There is no way to predict how each person's condition will progress. Learn about the four courses of MS.
Clinically Isolated Syndrome and MS Risk When your body attacks your nervous system, it’s often diagnosed as multiple sclerosis. But when it happens just one time, that’s considered clinically isolated syndrome (CIS).
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