Ditto.

Erin, my experience with this is that it is permanent (or for as long as an attack), if it's related to MS. However, mine does get worse and better, depending on the way I sleep or sit (positional) . . . and my neuro did say that it was a l'hirmittes type symptom.

It doesn't just affect one arm though, it is always both arms and both feet, when it is "position" related (for me), and the sensation doesn't take several hours to go away (usually a few min, then it's back to normal tingling).

Like Kelly though, I always have the sensation, it's just worse after being in certain positions.

Try sleeping another way to see if that makes a difference . . .

Cherie