My daughter has just been diagnosed with MS and she is experiencing terrible cramping of her right arm?

Muscles cramp up when there is a tightness to the inner part of the muscles to cause them to happen. It's those muscles that we often feel after the worst of the cramp is over that can leave a lingering pain in the area. Releasing the muscles will get rid of that inner tightness that is causing them to happen and here's how to do that release: The basic part is to put pressure on the muscles for 30 seconds, then to stretch the muscles when possible, and to hold them in that stretched position for another 30 seconds which should give them the new memory. If it's the biceps in the arm hold her arm bent and press into the muscle at one end and hold a firm pressure on it. Have her relax her body by taking a deep breath and exhaling. After the 30 seconds slowly extend the arm all the way out, then release the pressure but continue to hold it extended for another 30 seconds. I take it it's her thigh muscle doing the cramping and here's how to release that muscle for her relief:

Thigh muscle:

Sit on a chair with your leg partially extended to where it feels comfortable. Wrap both hands around the muscle about 2 inches behind your knee. Press in with both hands and hold a firm pressure on the muscle. Now relax, take a deep breath and exhale, then remain this relaxed. After 20 seconds or so you should feel the muscle releasing. As it’s a big one it’s going to continue to do so for about a minute or so. When you no longer notice any releasing happening, slowly slide your foot back up to the chair, then release the pressure on the muscle but continue resting your foot by the chair for another 30 seconds.

I have a cousin with ms who was using a walker to get around and I used a similar release for muscles around her knees so she was able to get up and walk without her walker which surprised her for she had been seeing the top dr.'s for her care and none of them had helped her in that way before.