I would guess not.
I've had only one known exacerbation, but my c-spine lesion is apparently the gift that keeps on giving.
My 1st c-spine MRI wasn't until 15 months after the first sx, so I guess the lesion could have been 'growing' all that time, but to me it's just one long attack...
My sx started as paresthesia in my feet (I know exactly
what you mean about rocks in the shoe), and spread to 80% of my skin over a period of 3 months, with the occasional muscle spasms thrown in for good measure. That's when my physiatrist (who was helping me with some simultaneous 'mechanical' back problems) sent me to a neuro. That was almost two years ago (dx was 1 yr ago), and since then I've also had increasing fatigue-like issues with my arms & shoulders. Some patches of skin will sometimes feel normal, and all the sx vary in intensity a fair amount.