Yes, there are different kinds. I don't know all the details (or remember the names) but I had a friend who had it. When I first knew her, she had relapsing-remitting, which basically meant sometimes she was almost totally fine and sometimes she had occasional flare-ups. At that point, you wouldn't have known there was anything wrong, except she had a cane to occasionally help with balance (but didn't restrict her ability to do anything). Later, it was progressive and she got significantly worse, requiring a wheelchair and home care to come in a couple times a day to help with basic day to day stuff, like showering, etc.
I don't know if it switched from one kind to the other, or was always progressive but only became more noticeable over time.
She went overseas a couple times for treatments (there was a doctor that claimed he had a cure but it never got approved in Canada), but they didn't do anything for her.
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