The reason you're not supposed to pop pimples is that anytime you deliberately break your skin, you risk creating a scar or infection through the break in the skin. In addition, squeezing a pimple can force the bacteria-containing fluid through the layers of the surrounding skin, spreading the infection. But if you don't want to wait around for that Mount Everest on your forehead to erupt on its own, this article will show you the safest way to pop it. Note that these steps are specific to "whiteheads," where the pimple has a white top and liquid pus underneath the skin.