Multiple sclerosis is an inflammatory demyelinating disease of the central nervous system whose main manifestation is the development of sclerosis (lesions) in the CNS, which are the result of loss of myelin sheath around the axons of neurons, but also damage to demyelinated axons. The nervous system is divided into central and peripheral nervous system. The central nervous system is made up of the brain and spinal cord, while the peripheral ones are made up of nerves and ganglia. A neuron is the only cell in the human body that has the property of stimulating and conducting stimuli. It consists of the body of a nerve cell (soma), dendrites, axons and presynpathic axon endings. Multiple sclerosis is an idiopathic inflammatory autoimmune demyelinating disease of the central nervous system. There is a deterioration of the myelin sheaths of nerve cell extensions that serve to transmit stimuli between nerve cells. Multiple sclerosis is caused by the interaction of genetic and environmental factors that impair immune tolerance and cause demyelinating damage to the central nervous system by activating autoreactive inflammatory cells. Multiple sclerosis is the most common cause of neurological defects in young adults. It is estimated that there are about 2.5 million people in the world. It is most commonly diagnosed between the ages of 20 and 40, but can still occur at any age. There are four basic forms of multiple sclerosis divided according to clinical criteria, including the frequency of clinical relapses, time to disease progression and lesion development: Relapsing-remitting form (RRMS), secondaryprogressive form (SPMS), primary-progressive form (PPMS), progressive-relapsing form (PRMS).