Acne vulgaris is an inflammatory disease of the skin, caused by changes in the pilosebaceous units (skin structures consisting of a hair follicle and its associated sebaceous gland). Acne lesions are commonly referred to as pimples, spots or zits.
Truth is acne is actually part of growing. The acne pimples are part of the skin forming like wounds and cysts that occur as part of the changes a kid experiences in the process of puberty. Teenagers would seek counsel from any of their peers or even their parents...
The processes going on in the skin of a person suffering from acne are explained here. You also find a survey of the factors causing acne and measures you can apply yourself to prevent, cure or alleviate acne.