Numbness
My fingers on my left hand went white coz ov numbness but then I lookd down and my middle and ring finger were black at the tip from my knuckle . But about 5 mins they went normal colour as the numbness wore off after being numb for about 15 minutes

So I am just going to throw this out there because I get the same whiteness of my digits, fingers and toes. I also have reynauds on top of MS. You may want to let your neuro or primary know ❤️
Hello its been happing way long time ago , ive just put it down to primary progressive MS like one ov the symptoms .