As the saying goes, what goes in must come out. But when it comes to your complexion, it's not always that simple. Sweat, makeup, pollution—these are the daily assaults that pile up in the bottom of your pores. You may be tempted to squeeze out the gunk, but don't do it. Not only can squeezing cause scarring, but it can also easily damage delicate skin tissue, which leads directly to expanded pore size—very counterproductive. Here's how to safely clear out your pores and minimize their appearance.