Multiple sclerosis (MS) is a chronic condition in which the immune system attacks the fatty layer that’s known as the myelin sheath surrounding nerves. This, in turn, reducesTrusted Source the ability of nerves to carry signals. Symptoms of MS include vision problems, tremors, and emotional changes. While the cause of the condition may varyTrusted Source across patients, it is thought to arise from an inflammatory response.
Source: Medical News Today