Blackheads are pimples that form when a pore is clogged with oil, dead cells, and bacteria. They are called open non-inflammatory acne because the pore is not completely closed. Therefore, the acne nucleus close to the surface of the pore when exposed to the air will gradually turn black. Blackheads usually take a long time to get rid of. This easily makes you want to use your hands to squeeze them to make them disappear faster. However, many experts advise against squeezing by hand and suggest other ways to get rid of blackheads.