Bothered by blackheads? These little bumps on your face are actually caused by dirt, skin cells or sebum (which your skin secretes) blocking your pores. Blackheads are exposed to air, so the trapped material oxidizes and discolors. Whiteheads, on the other hand, are covered by a microscopic flap of skin, so they stay (as the name implies) white. Anyway, the cause doesn't … [Read more...] about 10 Ways to Prevent and Treat Blackheads