Yes, it's melanin and I forgot to mention that too, I only notice the contrasting colors with African-American people whose skin tone are a lot darker.
I don't think he has it either. Most exercises, especially if you are an athlete, will somehow cause you to mouthbreathe at times and we know that doesn't help at all with EC. I actually had to stop playing soccer because of this. Even going to the gym and lifting really heavy makes me mouthbreathe.
So this post mainly has to do with your lips visually looking off due to the color? Or does this still have something to do with the crusts?