I ve recently started a job where I m on my feet about 8 hours a day, and now my lower left leg (in the front area) keeps throbbing on and off...where the pain will come in waves. It s pretty annoying, and sometimes worse pain than other times. I ve been hydrating a lot (PowerAde, which I don t normally drink, but I had heat exhaustion a week ago), but nothing else has changed. Thoughts?