i've been getting them recently too and i supplement with ptassium and drink well over a gallon of water a day and bad thing is i get them in my upper abs (which is the worst place to get them because it scares the hell out of you). They just did a blood test at my doctor and when they come in i will tell you what they tested me for but it was something strange that causes it... so if the potassium doesn't hellp and staying hydrated doesn't help then check with your family doctor.