Do you get muscle cramps? How do you treat them?

It mostly happens under my jaw, when I yawn. A muscle cramp is when your muscles tighten on there own, and in that stage they become very sensitive. Occasionally it happens on my legs, but when that happens ill usually hold on to something or fall. When they occur I stay as still as possible because I'm afraid if I move it'll tighten more, causing more excoriating pain. What I'll do is, I'll grasp the area where the muscle is tightening in an attempt to calm the muscle. Where does it happen for you often? How do you deal with it? Any ways to prevent it?
Do you get muscle cramps? How do you treat them?
Post Opinion