Acne is among the world’s commonest ailments and it affects not only the skin of the face, as is popularly believed, but all over the body. It is cuts across all nations and all age groups. Once a person has reached post-puberty, acne can occur. A bacterium known as Propionibacterium acnes is held to be the cause of acne. When a person’s skin pores cannot properly eliminate the waste materials through perspiration, these materials tend to block the pores and cause the condition of acne. Exposure to the bacterium can aggravate the condition.