Multiple sclerosis (MS) is an autoimmune disease characterized by demyelinating lesions in the white matter of the central nervous system (CNS), occurring in genetically susceptible individuals in combination with environmental factors.MS is the most common and predominant of the CNS demyelinating diseases. MS has been known as an independent disease for more than 100 years. It is highly valued for its high incidence, chronic course and susceptibility in young adults. It is clinically characterized by episodes of focal disorders of the optic nerve, spinal cord and brain. These neurological deficits can have varying degrees of remission, and relapse. Depending on the nerve tissue affected, patients may experience impaired vision (optic neuropathy), limb weakness, balance disorders, mobility problems, numbness, sensory abnormalities, slurred speech, dizziness, and dysfunctional urination and defecation, which vary from person to person and in severity. These symptoms may decrease or disappear, or they may reappear after they disappear. It is not possible to predict whether or when new symptoms will develop. Multiple sclerosis is not easily detected in its early stages. Common symptoms include muscle stiffness in certain areas, weakness, loss of control, abnormal fatigue in the limbs, difficulty walking, dizziness, loss of bladder control, and disturbance of tactile, pain and warmth sensation. In this way, each symptom occurs one after another, or continues to worsen, and eventually can make the patient have difficulty swallowing. It can be disabling and bedridden. There is no specific medicine for this disease.