Majority of acnes are caused by the bacteria Acne vulgaris; where the word 'vulgaris' means 'a common type of'. The hair follicles on faces contain oil glands which is called sebaceous glands that secrete the oil or sebum. As a teenager's body begins to develop, his or her body undergoes lot of hormonal changes which make the sebaceous glands overactive, producing large amount of oil. These oils clogs up the pores containing bacteria or dead cells, as a result the bacterium multiplies causing redness and swelling; which cause pimples. Sometimes when the skin reacts with the bacterial infection, the pimple gets filled up with pus. A whitehead occurs when the pore is clogged and closes but later bulges out. Blackhead occurs when the clogged pore remains open and the upper surface gets darkened.
Below are five very basic yet important rules you need to remember when you're dealing with acne:
Nodule or Cyst – This form of inflamatory acne is large in size and usually very painful, nodules are inflamed, pus-filled lesions lodged deep within the skin. Nodules develop when the contents of a comedo have spilled into the surrounding skin and the local immune system responds, producing pus. The most severe form of acne lesion, nodules may persist for weeks or months, their contents hardening into a deep cyst. Both nodules and cysts often leave deep scars.
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