I had oily skin, too, when I was a teen so I know how frustrating it is. My skin was always glistening, my makeup didn’t stay on long because the oil came shining through, and pimples were a common occurrence. I was always jealous of those girls who seemed to have perfect, non-oily complexions, so I did a little research to find out why my face was so oily.
It turns out there are what’s called sebaceous glands under the skin all over our bodies, even where there is no hair. These glands are put there to produce oil to help protect the hair on our body and keep our skin from drying out, but sometimes they overproduce. When that happens, your skin pores release the excess oil onto your skin. There are multitudes of these sebaceous glands under the surface of your facial skin, especially in the T-zone: forehead, nose, and chin; if they start overproducing oil, your face is going to feel greasy. Some people’s skin tend to produce more oil than others (genetics can play a role) so if you fall into that category, you are going to be battling oily skin.