Anyone get muscle twitches that last for hours on end? I get them here and there and I started getting twitching in my back yesterday afternoon that lasted about 3 hours and then last night my right bicep started twitching pretty hard and today (about 15 hours later) is still going crazy!? I checked out Wiki, and doctors don't really know what the main cause it, but they attribute it to high intake of stimulants, and/or magnesium deficiency. I am pretty positive I am not deficient on magnesium and my stimulant intake has actually been cut the last couple weeks. It's not a huge deal, but it's freaking annoying.