Multiple sclerosis (MS) is a potentially debilitating disease in which your body's immune system eats away at the protective sheath (myelin) that covers your nerves. Damage to myelin causes interference in the communication between your brain, spinal cord and other areas of your body. This condition may result in deterioration of the nerves themselves, a process that's not reversible.

Symptoms vary widely, depending on the amount of damage and the nerves that are affected. People with severe cases of multiple sclerosis may lose the ability to walk or speak clearly. Multiple sclerosis can be difficult to diagnose early in the course of the disease because symptoms often come and go — sometimes disappearing for months.

Multiple sclerosis has no cure. However, treatments may help treat MS attacks, manage symptoms and reduce progress of the disease.

Dec. 15, 2012