Acne vulgaris, or commonly known as acne, is a skin problem that may begin when you are approaching to your teenage. It usually occurs as a result of clogged skin's pore. Skin's pores are clogged by oil and dead skin cells. Pimples, whiteheads and blackhead are the different variations of acne. Acne is commonly found in an individual's face, neck, chest, shoulders or at the back.