Whiteheads: Bumps that remain closed by oil and dead skin

Whiteheads are known as closed comedones. The follicles beneath your skin become filled with bacteria and have a very small opening at the top of your skin. Air isn’t able to enter the follicle, so the bacteria inside don’t undergo the same chemical reaction that causes blackheads to be dark.

Like blackheads, whiteheads are typically found on your back, shoulders, and face.