The symptoms experienced as a result of multiple sclerosis can vary greatly from person to person, and depend on which areas of the brain and spinal cord develop MS lesions.
The time course over which MS lesions develop, as well as the number and location of lesions, is different for each individual. Consequently, the time frame in which symptoms occur and the specific types of symptoms experienced is unique for each person.
Because of the large variability of lesions between individuals, MS varies greatly in severity. Some people may have rare, mild attacks over their lifetime and may not experience any permanent symptoms, while others may develop severe, permanent symptoms over a relatively short period of time.