Pimples, blackheads, zits, whiteheads, pustules, papules, and cysts are all forms of acne. Acne appears on the skin due to a number of factors such as when there is an excess production of sebum by the sebaceous glands, when the person experiences stress, if there are certain hormonal imbalances, or sometimes it may be hereditary. Once acne appears, it is very difficult to get rid of it. Thus preventing it is a much better option.