You may be experiencing anxiety or spasticity. Medication for depression/anxiety was a real eye opener for me. For the first time in my life I felt like the "small stuff" finally just rolled off my back. I fought taking the stuff for years but I'm really glad I tried it. Currently I take Celexa which treats depression, OCD, anxiety etc. Plus I dropped 12 lbs on it!

Spasticity is stiff muscles which can be relieved by baclofen or simular drugs. I get it bad in my neck and shoulders. I also go into bouts of twisted fingers and toes. Cold air makes it worse. Sometimes even the muscles in my jaw go tight and feels like TMJ.

Look into getting a stretching DVD and try the exercises. Jane Fonda makes a good one for "older folks" which works well when you have a health issue. You have to focus on stretching and not so much "exercising". When I tense my muscles (like in a sit up) my muscles go right into a cramp!

MS and your symptoms will be a learning process. Hang in there