Multiple sclerosis, is a medical condition that results from the damage to the protective cover of the nerves called the myelin sheath. This destruction occurs as a consequence of the body’s immune cells attacking the covering. Once this damage occurs, scar tissue may form over the myelin. The destruction of this layer renders the brain incapable of correctly sending out signals throughout your body. As a result, various aspects of your body, as well as your nerves, work abnormally. Currently, the cause of multiple sclerosis is unknown. Doctors, however, have been able to point out that activities such as smoking increase your risk of getting the disease. Minerals such as vitamin D can decrease your chances of having multiple sclerosis. Most people who have multiple sclerosis experience numbness or tingling sensations, weakened muscles, spasms, weak bladder or bowel control and chronic pain. They may also have problems remembering certain things and may feel excessively tired. 400,000 Americans are currently living with multiple sclerosis.