Acne, pimples and zits are all words for the same thing. These are the small, reddened areas usually found on the skin. Oil-producing glands on the skin might go into overdrive, causing skin cells to get trapped in the pores. Sometimes they are white when germs enter and the skin over it is seals — hence the name whiteheads.
They can also be black when exposed to air — hence are called blackheads. It is something that is often a cause of great distress for both teenage girls and boys. Occasionally, these pimples are found on the face, neck and back. This more severe form is called acne vulgaris.