Hi, I've recently started a job where I am standing all day, since last Saturday I've had a really bad soreness in my leg and foot, its very tingly like when its sunburnt, its only at the back of my left leg and in my calf, theres no rash and it doesnt look sore but it really hurts, any idea what could be causing this and how I can make it better? I've tried hot baths but it doesnt help at all? thanks :)