A ';zit'; is just a slang term for ';pimple';, which is just defined as a clogged pore of some type.
While the symptoms vary in severity, you will notice these signs on areas of the body with the most oil glands (the face, neck, chest, back, shoulders, and upper arms):
* Clogged pores (pimples, blackheads, and whiteheads)
* Papules (raised lesions)
* Pustules (raised lesions, with or without pus)
* Cysts (nodules filled with pus or fluid)
If blocked pores become infected or inflamed, a pimple -- a raised red spot with a white center -- forms. If the pore clogs, closes, and then bulges, you have a whitehead. A blackhead occurs when the pore clogs, stays open, and the top has a blackish appearance due to oxidation or exposure to air. (This has nothing to do with skin being ';dirty';). When bacteria grow in the blocked pore, a pustule may appear, meaning the pimple becomes red and inflamed. Cysts form when the blockage and inflammation deep inside pores produce large, painful lumps beneath the skin's surface.
The least severe type of acne is the whitehead or blackhead. This type is also the most easily treated, usually with over-the-counter products. With more extensive acne, prescribed medications are often needed to reduce the inflammation, bacterial infection, redness, and pus.
Hope this answers your question!
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