Muscle stiffness

My left masseter muscle seems a bit tense. It's been bothering me but not preventing me from normal opperations. It might just be from some of the neck strenghtening and lengthening exercises I did the other day with Joanne Abbot. I hope so. If so I don't expect it to be still stiff tomorrow or at least by Friday. However, I havn't ruled out MS completely yet. Just thought it was something to note, but not worry about.

Cheers.