Acne is found quite often in pubescent individuals. Because of a high genetic disposition to the condition, acne is particularly common in Western societies. It is believed that the presence of acne is due to an abnormal response to normal levels in the body of testosterone, the male hormone. For many individuals, this response tends to diminish over time, causing the acne to decrease by the time they reach their 20's, or even disappear. Unfortunately, it is impossible to tell how long it will take for acne to completely disappear; for some people they may experience it for many decades- even beyond their 30's or 40's. A large number of people will experience this condition at some point in their life.

There are several different types of acne, as described below:

1. Acne Vulgaris - The most commonly experienced forms of acne and will appear around puberty it is typically to be found on a person's face, shoulders and chest.

2. Acne Rosacea - This is a red rash which is predominantly found on a person's face.

3. Acne Keloidalis Nuchae (also known as Pseudofolliculitis Nuchae)- this form of acne is caused by shaving.

4. Acne Conglobata (also knowns as Hidradenitis Suppurativa) - usually found in armpits, on the groin or buttocks, or also under women's breasts. This type of acne describes chronic abscesses or boils on sweat glands and hair follicles.

5. Acne Cosmetica - as indicated by it's name, this form of acne is caused by cosmetic use.

6. Acne Fulminas - Is an extreme form of Acne Conglobata.

7. Acne Medicamentosa - typically triggered by starting or finishing a course of medication.

8. Baby Acne - very commonly found on infants. It is a rash that can be found on the baby's cheeks, chin and forehead.

9. Chloracne - caused by being exposed to chlorinated hydrocarbons, such as PCB's or dioxins.

Hopefully the information provided to you above with regard to acne will help you to understand more clearly what it is and how it is caused.