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Acne vulgaris is the most common type of acne Acne vulgaris is the most common form of acne, characterized by a mixture of inflammatory and non-inflammatory skin lesions (see all acne types). You may prefer to call acne "pimples," "spots," or "zits." Who gets acne vulgaris? Most of us have had acne at some point in our lives. It can affect people of any gender or race, although it's most common in teenagers. However, acne can occur at any age. What are the main characteristics of acne vulgaris? Acne usually affects the face, but it can spread to the neck, chest, and back, and sometimes more extensively over the body. Individual lesions are centered on the pilosebaceous unit, which is the hair follicle and its associated oil gland. Several types of acne spots can occur at the same time, including inflammatory papules, pustules, and nodules, or non-inflamed comedones and pseudocysts.Individual acne lesions usually last less than 2 weeks but the deeper pa...