I went from having a job standing up all day to having a desk job. So, when I started getting cramps I thought it was just from sitting down all day. I started exercising when I got home, just to try and counteract the lack of activity. It didn't help at all. They start, and hurt the most, behind my knees and spread up and down. I've started getting tingling in my feet and a sort of pulsing in my thigh. It's kind of freaking me out. I know my diet isn't what it should be, so deficiencies could be a problem, but I'm just not convinced. Please help, this is only one of many problems I have going on, but it's the only one that doesn't make sense! Help!