What is acne? Acne is generally known as a pimple or clogged pore. In medicine, it is known as acne vulgaris. Nearly 85 percent of the human race faces acne during their lifetime (American Academy). Acne vulgaris is a skin disease that affects the sebaceous glands located at the base of hair follicles (Medical News). Acne can occur anywhere from the face, neck, chest, back, shoulders, and even upper arms. There are several factors that determine the causes of acne development. These factors include overproduction of sebum, blocked hair follicles, battery, hormones, stress and even genetics. Acne can be treated medically, with over-the-counter products, or even natural remedies. Although over-the-counter products may contain harsh chemicals, they are one of the most beneficial and effective ways to treat acne vulgaris. Many people think of acne as just acne, but there are different types. Acne ranges from whiteheads, blackheads, papules, pustules, nodules and cysts. The whiteheads remain under the skin and are very small. Blackheads are visible and appear black on the surface of the skin. Papules are also visible on the surface of the skin, these are small bumps usually pink. Pustules, similar to papules, are also visible on the surface of the skin. They are red at their base and contain pus in the upper part of the pore. Nodules can be seen on the surface of the skin and are usually large, solid, painful pimples buried deep in the skin. Cysts may also be visible on the surface of the skin. They contain pus and are very painful. Cysts can also easily cause scarring or hyperpigmentation. Although acne can leave scars, they are not dangerous. In human skin, there are pores that are... middle of paper ......ttp://www.medicalnewstoday.com/articles/107146>."Topical Azelaic Acid: Drug Information MedlinePlus ." United States National Library of Medicine. United States National Library of Medicine. and Web. May 20, 2014."How Does Sulfur in Facial Cleansers Help Clear Acne?" UCSB Science LineSqtest. National Science Foundation. np, nd Web. May 20, 2014..Deschutes Dermatology. “Acne Bend OR.” Deschutes Dermatology Acne Bend ORDeschutes Dermatology. and Web. May 20, 2014..American Academy of Dermatology. “Different types of buttons”. Different types of buttons. American Academy of Dermatology. and Web. May 20 2014..