This happens to me all the time. Whenever I cry or sweat, it leaves white streaks. I also wipe my eyebrows, nose, and chin a couple times a day because white crystals will collect there. I used to think it was embarrassing, but now I'm used to it. I think what other posters said is correct, it depends on how high your sweat test numbers are. Mine were really high. Hope this helps <img src="i/expressions/face-icon-small-smile.gif" border="0">