Comedones, more commonly known as blackheads, are one of the most common causes of acne, particularly for those who have oily skin. It is caused by excess oils that have accumulated in the sebaceous gland's duct. Generally, when acne vulgaris begins, its starts as blackheads and whiteheads.

 
 

For both adolescents and adults, acne can be an aggravating problem. There are many variations of acne and differing degrees of severity. The physical, emotional and psychological effects can be devastating, affecting an individual's confidence, self-image and self-esteem for many years.