It's also known as MS. In MS, the immune system attacks the protective sheath that covers nerve fibers, known as myelin. This interrupts communication between the brain and the rest of the body. Eventually, the disease can cause permanent damage of the nerve fibers. With optic neuritis as the most common presenting symptom, people with MS notice sub-acute loss of vision, often associated with pain worsening on eye movement, and reduced color vision. Early diagnosis of MS-associated optic neuritis helps timely initiation of targeted treatments. Multiple sclerosis (MS) damages the protective cover around nerves called myelin in your central nervous system. It can cause muscle weakness, vision changes, numbness and memory issues. Access all your Microsoft apps, services, and games with one account. Whatever you’re doing, wherever you are, just go. Your account profile and preferences sync across all your devices. Wherever you are, it’s all here. People with multiple sclerosis (MS) tend to have their first symptoms between the ages of 20 and 40. Early on, the symptoms get better, but then they come back. This is called relapsing-remitting. Can’t access your account? Terms of use Privacy & cookies. Many people with MS use a variety of alternative or complementary treatments to help manage their symptoms, such as fatigue and muscle pain. Exercise, meditation, yoga, massage, eating a healthier diet, acupuncture and relaxation techniques may help boost overall mental and physical well-being. No account? Create one! Can’t access your account? Terms of use Privacy & cookies. Find out about multiple sclerosis (MS) including the symptoms, types, causes, how it's diagnosed and the treatment and support available. Multiple sclerosis (MS) is a chronic neurological disorder. It’s an autoimmune disorder, meaning that in MS, the immune system—which normally protects us from viruses, bacteria, and other threats—mistakenly attacks healthy cells. MS symptoms usually begin in young adults, between ages 20 and 40.