Multiple sclerosis (MS) is a condition affecting the nerves of your brain and spinal cord. Your brain and spinal cord are called your central nervous system (CNS). In MS, the ‘myelin sheath’ which protects some of your nerves becomes damaged – this is called ‘demyelination’. Demyelination of a nerve stops it working properly and can cause weakness, numbness, changes in vision and more symptoms. Most people with MS will also develop fatigue and mobility problems.
