4. Acne
“Excess dirt, oil, sweat, and makeup accumulate on your face throughout the day and form a film on your skin,” says Zeichner. “The skin can’t breathe properly with this film over it, so oil and sticky cells build up underneath, forming blockages.” That’s when you’ll start seeing acne appear. It’s like the bathtub you’ve been meaning to clean for a few weeks now — soap scum builds up every day, making it a much harder (re: grosser) job to do when you finally get around to it.
