Multiple Sclerosis (MS) - Cause

The cause of multiple sclerosis (MS) is unknown. Because a person's risk of MS is slightly higher in some families when a relative has MS, there may be a genetic link. For more information, see What Increases Your Risk.

Some research suggests that where you lived as a child and viral illnesses you have had could be triggers for MS later in life. But these links have not been proved.

WebMD Medical Reference from Healthwise
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