Geographic location, or where you lived
during childhood (up to age 15). People who spend the first 15 years of their
lives in colder climates that are further away from the equator tend to be more
likely to develop MS than people who lived closer to the equator during those
Family history of MS. People who have a parent or
sibling (including an identical twin) with MS are at slightly higher risk of
developing the disease.
Race. People of Western European
ancestry are more likely to develop MS. It is uncommon in Native Americans,
Eskimos, Asians, and Africans.
Being female. MS is about three
times as common in women as in men.