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What causes a multiple sclerosis relapse?

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An multiple sclerosis relapse starts when nerves in the brain and spinal cord get inflamed (swollen or irritated). Then those nerves lose the coating, called myelin, that surrounds and protects them. A plaque forms around them instead.

SOURCE: 

Multiple Sclerosis Foundation.

Reviewed by Christopher Melinosky on August 26, 2019

SOURCE: 

Multiple Sclerosis Foundation.

Reviewed by Christopher Melinosky on August 26, 2019

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What causes the symptoms of multiple sclerosis?

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