Most scientists and doctors in the field believe that Multiple Sclerosis is an autoimmune disease. It is the destruction of the protective covering of the nerves of the central nervous system and brain. The immune cells for some un known reason, turn against the myelin sheath of these nerves. The destroyed portions are replaced with scar tissue. It can happen at any number of portions of any central nerve. Hence the name Multiple Sclerosis or MS. Like other autoimmune diseases, MS also has the character of periodic flare-ups and remissions. Many of the features of multiple sclerosis are peculiar. Women are more prone to it than men.

Nerves have a central core of nerve fiber which is covered by a very thick layer of Myelin. This layer, in addition to protecting the central nerve fiber bundle, plays an important role in the conduction of the electrical nerve impulses. When this sheath is damaged and replaced with scar tissue , the transmission of the nerve impulses is impaired. If the myelin is totally absent the conduction of the outward signal stop altogether.

The exact causes for this are not known. What are known are the risk factors and some of the trigger factors. Treatment centers around suppression of the immune system with all its attendant complications.

Some of the commonly established factors that usually most likely to be the target of MS are the age group of 18 to 60 y ea rs, wome n, those of European descent, genetics and heredity, the geographical location. Higher away from the equator the incidence of MS increases. There appears to have multiple triggers, ra ther than a single or limited. Similarly , the known trigger are infections, especially viruses like Epstein-Barr (mononucleosis), varicella zoster. This is not completely established.

Urge incontinence or urine retention, constipation, memory loss, difficulty in finding words, depression and emotional changes are some of the common complaints. Life expectancy is generally not affected.