I have a small, circular, flat, light brown mole on my upper lip. I got a cold sore directly on that spot. After it healed, my mole appeared darker (no other changes). Can this change in color be a result of the cold sore? I've had 4 IPL sessions for upper lip hair removal. The last session was ~4 weeks PRIOR to onset of the cold sore. There were no signs of darkening of the mole after the IPL sessions. It was only after the cold sore healed. What made my mole darker?!?