What is multiple sclerosis?

Multiple sclerosis (MS) is a condition that can affect the brain and spinal cord, causing a wide range of potential symptoms. In many cases, it's possible to treat the symptoms. 

MS is a lifelong condition that can sometimes cause serious disability, although it can occasionally be mild.

MS is one of the most common causes of disability in younger adults. MS is most commonly diagnosed in people in their 20s and 30s, although it can develop at any age. It is about two to three times more common in women than men. 

Average life expectancy is slightly reduced for people with MS.