It has been estimated that 80% of Americans population have at some point had acne. Acne deos not discriminate and reaches across all genders, sexes and ages. The really good news regarding acne is that it is not transmittable. Acne may not be able to spread from one person to another, however it can spread to all parts of the face and can severely affect all the skin tissues that have pilosebaceous units. Acne does not just affect teenagers as it can be experienced by infants and even thosein their forties. There are different types of acne, for instance, Acne infantilis, is the term givent to acne that developes on newborn babies, and acne rosacea is the form of acne that affects middle-aged people. Acne is classified regarding the severity of the infection. Comedo is the form where all severe acne cases originate. This is characterized by red swelling or small lesions on your skin. Whiteheads and blackheads are two forms of comedo. Conversely, blackhead is an open comedo. The coloration is due to the accumulation of dark skin pigments called melanin, plus hardened sebum and other skin debris and particles. Nodules are similar to pustules, however, nodules are firmer and are larger and grow deep in the skin. Inflammation may cause the pustules to become filled with semi-liquid or liquid materials composed of white blood cells, dead skin cells and active or inactive bacteria. This may result in more serious acne called cysts. If this does happen you may need the assistance of a skin dermatologist or physician. What causes acne? It is very hard to exactly determine what may have caused an acne outbreak as reasons will differ from case to case. Studies have shown that this disorder may be brought about by many different factors, including poor diet, stress, weather elements, and hormone changes or may even be genetically influenced.