Multiple sclerosis (MS) is a condition in which the immune system attacks your myelin, the sheath that wraps around nerve cells. The symptoms of MS can vary widely, depending on the nerves that are affected. Learn more about the risk factors, symptoms, and treatment options.

Multiple Sclerosis Basics

Illustration overview of Multiple Sclerosis
What Is Multiple Sclerosis?

Risk Factors

EBV and MS connection
Research Suggests Epstein-Barr Virus Raises Risk of Multiple Sclerosis

Explore Multiple Sclerosis

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What I Wish I Knew About Multiple Sclerosis
Brandee Evans sits with the words "Multiple Sclerosis What I Wish I Knew" next to her
What I Wish I Knew About Multiple Sclerosis in the Black Community
taking medication
How Is Multiple Sclerosis Treated?
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Selma Blair Revealed the Alarming Symptom That Led to Her MS Diagnosis
This Artist Is Inspiring Other MS Patients With Paintings of Their MRIs
This Artist Is Inspiring Other MS Patients With Paintings of Their MRIs
Selma Blair MS Remission
Relapsing-Remitting Multiple Sclerosis and Stem Cell Treatment for MS
Young woman hiking with numb tingling leg
8 Causes of Leg Numbness
Christina-Applegate-Announced-She-Has-MS-GettyImages-1176442316
Christina Applegate Says She Has MS: 'It's Been a Strange Journey'
My Doctor Dismissed My MS Symptoms as 'Stress'—Even Though My Body Was Going Numb
Handicapped lady on a dock
Facial Numbness Led to My Multiple Sclerosis Diagnosis
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I Was Diagnosed With Multiple Sclerosis (MS) at 31
dancer , MS , multiple-sclerosis , Female dancer moving gracefully and powerful in a bright colorfull room, long time exposure
Dancer Visited Multiple Specialists Before Finally Being Diagnosed With Multiple Sclerosis