it does sound like lhermitte's. i had quick ascending numbness when i got diagnosed. it mostly went away but i when the neuro tests my feeling in my feet (with an actual tuning fork funnily enough) he demonstrates that my feet are still a little numb. my hands are certainly still somewhat numb 6 yrs later. it's my 'new normal'.
it probably means there's an active c-spine lesion. can't say anything with certainty but a lot of ms patients have relapsing remitting, which means things tend to get better after they get worse.
READ ME key info on nutrient targets - www.thisisms.com/ftopict-2489.html
my approach: no meds so far - just nutrient-dense anti-inflammatory whole foods, and supplements where needed
info: www.whfoods.com, www.nutritiondata.com