Origin of acne

There is a huge controversy surrounding the origin of acne, but the fundamental problem is the presence of excess fat production by the growth of the Sebaceous gland. All this is the result of internal chemical changes that occur in puberty, especially when the skin must adapt to the rise in hormone secretion. 
Simply put, it happens that these glands, to grow and become Hyperactive, is shown clogged a heads with black and white. Glands continue to produce more fat that has no where to exit. This enables the bacteria normally found in the skin without causing major disorders, to begin Suddenly Multiply within these secretions, causing the visible mud that can be infected and encysted Scars leave.
Acne is submitted, therefore, in those areas of the body where Sebaceous glands are larger, and neurosis active: The face, chest and back.
Many factors may aggravate the condition, are those that INHIBIT the secretion of fat to flow freely from the Sebaceous glands, such as lack of cleanliness, long hair, especially the fringe, hair Moisturizers for substances and other cosmetics contain LANOLIN. Thus becoming clogged sebaceous gland that is already clogged, causing further injuries.
It has been observed that young people who work in restaurants  self, being constantly exposed to FATS and oils are more prone to acne appearance.