I've had a slight tickle feeling on my left temple for the past 3 weeks. It seems to move around a bit, it started next to me ear, then moved closer to my eye brow, now it's kind of in the middle. The best way to describe it is if you had a drop of water on your skin, about to run down your face. Sometimes it is very slight and can be totally unnoticed, other times it's way more pronounced. This is during a time of extreme and constant stress. Any ideas?