the National MS Society website is www.nmss.org
they have tons of information there
There are basically 2 types of the disease, chronic-progressive and relapsing-remiting, The first type is where you have symptoms all the time and they get worse over time. The second type is where symptoms will appear for a period and then they will lessen or disappear. Relapsing-remitting can sometimes develop into chronic progressive as the disease progresses.
My mom has chronic progressive MS and has had it since she was in her late 20's/early 30's (she's 55 now), this was back in the 70s when this disease was rarely diagnosed, most patients were told they were imagining it or just trying to get attention, or at least this is what my mother heard from doctors. The good news is that treatments for MS have improved dramatically over the past 30 years. My mom was in a beta-seron trial back in 94 or 95 but the medicine was really affecting her moods and general well-being. The most important thing to remember with this disease is that attitude is EVERYTHING! When my mom was diagnosed in 1981, the dr told her she would be in a wheelchair in 3 yrs and bedridden in less than 10. Well lemme tell ya my mom is as stubborn as the day is long and just recently has she started using a wheelchair to go to the grocery, mall etc. If your sister, and family in general, can stay positive and not focus on the bad days, it can make all the difference in how the disease progresses. What med is your sister taking? She might want to look into clinical studies (they go on all the time!) where the $$ of meds would be less or none at all! I hope this helps and if you ever need to vent or someone to listen, you can email me, (firstname.lastname@example.org) I have lived with MS all my life, I don't ever remember my mom not having symptoms and can probably relate to what your family is going through. My mom's favorite saying is "this too shall pass" and remember that attitude is sometimes stronger than any drug!