Hi Everyone!! New old guy here, hoping to get some advice and avoid costly tests. About 2 weeks ago, I was stepping out of my truck with my left leg (which are slightly short) to the ground, when I felt a slight pain on back of my leg right behind knee. It seems like a burning sensation and goes away immediately. This is reoccurring performing different tasks. Yesterday at work, I was sitting in my machine and repeatedly felt like I was being stung (in the same location as the pain) by something, this to finally quit. I cannot seem to make any of this occur while trying to, it just comes and goes. Any ideas?