Your forehead is home to a bazillion tiny glands called sebaceous glands. Their job is to pump out sebum, a lovely oil that keeps your skin soft and waterproof. But sometimes, these glands act like a teenager with a credit card at a candy store: uncontrollable.
One big culprit is androgens. These are hormones that scream, “Let’s make oil!” like a drill sergeant on espresso. You can thank your pubertal self for waking these guys up—they rarely go back to sleep.
Fact you didn’t ask for: Your forehead has more oil glands per square inch than your cheeks. It’s basically the Texas of your face when it comes to grease production.
Genetics: Thanks, Grandpa
If your dad’s forehead looked like a glazed donut, yours probably will too. Genetics dictate how oily you are, like a cruel lottery of shine. You didn’t choose this life; it chose you—through a DNA cocktail of Mediterranean olive skin or teenage acne legacy.
Genes control how sensitive your glands are to hormones. So if your forehead repels water like a duck’s back, blame your ancestors. They probably survived a drought by licking their own faces.
