Are you falling asleep with your makeup on. "The more you sleep while wearing your makeup, the greater the damage there is to your skin," says dermatologist Jeannette Graf, MD, assistant clinical professor of dermatology at Mount Sinai Medical Center, NY. "Our skin, like the rest of our body, functions on the circadian rhythm. At night the skin's most important function is to renew itself. Wearing makeup and foundation at night prevents the renewal process, causing damage to the skin."

When you sleep, your body temperature rises. The added heat opens pores, allowing makeup to sink deep into the pore and surrounding hair follicle. As the makeup advances into your skin, it carries oil & bacteria with it. When this sticky mess becomes trapped below the surface level of your skin, acne is caused and blackheads form. Even the pores & hair follicles around your eyes can become plugged with residue from eye shadow. This will cause painful, infected red bumps called Styes, which can take days to heal, and may require antibiotics.

Each of our organs heals & rejuvenates itself during sleep - including our skin. Ever notice that when you don't get enough rest, your skin looks sallow, blotchy & irritated? Instead of having a healthy glow, it will have yellowish undertones and look exceedingly dull. This is because your skin's cell turnover is not complete, as it hasn't had a chance to recover from the previous day. When you wear makeup to bed, it hinders your skin from its own recovery process. For the next few days afterwords, you'll see the aftermath of sleeping in your makeup. Your skin will produce more oil, and blemishes will take longer to heal, and new blemishes might pop up.