Blackheads are a form of acne that is a result of excessive oil secretion. Blackheads are oily granules that caused the skin’s pores to be clogged. Another form of this acne also includes milia that can be caused by excessively moisturizing skin care products. Overtime, blackheads can turn into inflammatory acne as bacteria growth continues. Without proper treatment, blackheads can turn into papules, pustules, and even cystic acne. The level of severity varies from person to person and requires careful treatment.