Multiple sclerosis (MS) is an autoimmune disease that attacks a part of the body called the central nervous system (CNS). The CNS controls functions such as the ability to walk and think. For people living with MS, damage to the CNS can cause a variety of symptoms, including vision loss, numbness, or walking difficulties. MS can affect everyone differently, so people may experience different types of symptoms. Check out other articles to learn more about MS, who gets it, and how it may affect the body.