Acne sufferers experience persistent, recurring reddish blemishes on the face, chest, shoulders, neck, upper back or buttocks. When these blemishes are spots that have a dark, open center, they are called blackheads.
Whiteheads are spots that bulge under the skin and have no opening.
Pimples, on the other hand, are whiteheads that rupture. The boil-like lumps are called nodules. Despite the common myth, poor hygiene or poor diet does not cause Acne. It is believed to be the result of an overproduction of sebum, a waxy substance that lubricates the skin. The sebum may plug a hair follicle, bacteria grows inside the blocked follicle resulting in an inflammation.