ince yesterday night I starting feeling an extreme dry burning sensation on the left upper lip starting. To be precise exactly above the point where the lower lip and upper lip join. It looks like a small white spot. No redness but feels like burning sensation. Even after applying vaseline aloe Vera lip balm the burning sensation is still there. I am very scared . Could it be cold sore . I am 30 years old and I have never had cold sore in my life.