Multiple sclerosis is a chronic disease of the central nervous system characterized by demyelination of neurons. It typically occurs between ages 20-40 and involves periods of remission and exacerbation. The causes are unknown but may involve an autoimmune response or viral infection. Symptoms include fatigue, weakness, vision problems, numbness, tremors, and emotional changes. Diagnosis involves a medical history, physical exam, EEG, and lumbar puncture. Management focuses on conservation of energy during exacerbations, safety measures, exercise, assistive devices, therapy, a balanced diet, and medication administration.