All you guys with your "get up and mix some tonic and Suny D" or "drink pickle Juice" ain't got my cramps! I don't get them often, but when I do (cue the Dos Equis guy) my body goes into freeze mode; I can't move and try to just straighten out the leg slowly when I know that if I could just jump out of bed and put pressure on the ball of my foot it would probably go away. But my mind just seems to say, "don't be stupid - moving might make it worse!" After what seems like hours but is probably 30 seconds, it subsides and I wipe away the tears and hope I didn't let out the scream I heard in my mind. Wife probably couldn't hear it anyway (I have to shake her in the morning when her alarm goes off!). Fortunately I only get one per night, but if I get it I'll still have a knot in my leg in the morning.
I get ALL the labs regularly (trying to sort out some thyroid and A1C issues) so most everything is within the acceptable ranges. Eat a banana at least five mornings a week, do pretty well at getting a minimum of half gallon of water each day in addition to coffee or other libations. Best I can tell it's electrolytes - too much water and not enough potassium and sodium to replace what I might lose to sweat during the day. I had water poisoning once (yep - too much water, cells swell up and body started to go into shock!) so I TRY to remember to drink a lot of Gatorade or my home-brew electrolyte solution. But my leg will likely let me know if I didn't do a good enough job of remembering.
Seems what goes around, comes around - I had what my mom called "growing pain" cramps in my legs when I was about 10 or 12. Here I am nearly 60 years later and they're back.
If you want to know what REAL cramps are, go to dialysis and have to them draw to much fluid or draw it too fast. That's 5-10 minutes of the most intense cramps anyone will ever have. Realizing also that your arm is connected to IV tubes so you can't get up and walk them off.
All the tech do is lower your legs and watch you while you're in pain. Lots of fun.