MS is called Multiple Sclerosis.
Multiple sclerosis (MS) is a chronic, potentially disabling disease that affects the brain and spinal cord (the central nervous system). In MS, the immune system attacks the protective sheath (myelin) that covers nerve fibers and causes communication problems between the brain and the rest of the body. Ultimately, the disease can cause the nerves themselves to deteriorate or become permanently damaged.
While the exact cause of MS is unknown, it is considered an autoimmune disorder, meaning the body's immune system mistakenly attacks its own tissues.
The symptoms of MS can vary widely and depend on the location and extent of nerve damage. Some people with severe MS may lose the ability to walk independently or at all, while others may experience long periods of remission without any new symptoms.