I've been getting TONS of these all week.....this seems to happen from time to time for me, and it starts off maybe once per day, then before you know it I am up most of the night, trying to get the knots out of my muscles. I've had these every single night and day this week, in my right calf and foot and in my left neck/shoulder muscle. I've had more this week than at any other times combined. I did a search and came up with this, but I don't think any of these are the reasons, it's certainly not dehydration, injury (not any recent ones, anyway), over use or holding in one position: "Muscle cramps are usually caused by: Over fatigue Dehydration Over use of the extremity Injury Sprains or strains Holding a muscle in one position for an extended period of time Circulation or nerve problems" So, my question is this: I normally take Soma in the morning, and my RX had run out and I didn't take any all week. Could this possibly be the reason?