What is acne? Acne is typically known as a pimple or a blocked pore, medically it is known as Acne Vulgaris. Nearly 85% of the human race encounters acne in their lives (American Academy). Acne vulgaris is a skin disease that involves the sebaceous glands at the base of hair follicles (Medical News). Acne can occur anywhere, on the face, neck, chest, back, shoulders and even the upper arms. There are several factors that determine the causes of acne development. These factors include overproduction of oil, blockage of hair follicles, bacteria, hormones, stress and even genetics. Acne can be treated with medications, over-the-counter products or even natural remedies. Although over-the-counter products may contain harsh chemicals, it is one of the most beneficial and effective ways to treat acne vulgaris. Many people believe that acne is just acne, however, there are various types. Acne ranges from pimples, 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, they are small bumps usually pink in color. Pustules, similar to papules, are also visible on the surface of the skin. They are red at the base and contain pus at the top inside the pore. The nodules can be seen on the surface of the skin and are usually large, firm pimples that are painful and buried deep in the skin. Cysts can also be visibly seen on the surface of the skin. They contain pus and are quite painful. Cysts can also easily cause scarring or hyperpigmentation. Although acne can leave scars, they are not dangerous. Inside the human skin, there are pores that are... center of paper......ttp://www.medicalnewstoday.com/articles/107146>."Azelaic Acid Topical: MedlinePlus Drug Information. " National Library of Medicine of the United States.National Library of Medicine of the United States. nd Web. May 20, 2014.."How does sulfur in facial cleansers help clear acne?" UCSB Science LineSqtest. National Science Foundation. np and nd Web. 20 May 2014..Deschutes Dermatology. “Acne Folding O.” Deschutes Dermatology Acne Bend ORDeschutes Dermatology. nd Web. May 20, 2014..American Academy of Dermatology. "Different types of pimples." Different types of pimples. American Academy of Dermatology. nd Web. May 20 2014..