Many years later, when I stood in front of the convex mirror, I would always think of the afternoon when my close friend from junior high school took me to the faucet on the playground to wash my face after the PE class. At that time, we were in our early teens, our faces were bright and full, cold water quickly slipped through our skin, and then we raised our faces and could not see a pore. Later, how did our faces become so thick with pores? Reason 1: Excessive sebum During puberty, androgen levels are relatively high for both men and women, which catalyzes teenagers to develop secondary sexual characteristics and begin to grow. At the same time, our Read More …