Impure, combination skin with imperfections is generally caused by sebaceous gland dysfunction associated with overproduction of the enzyme 5-alpha reductase; this affects sebum production ultimately resulting in excessive sebum production.
The skin takes on a shiny, greasy appearance, which can sometimes be accompanied by inflammatory conditions. When sebum is produced in large quantities, it excessively dilates the walls of the hair follicles, which it then clogs, causing blackheads and pimples.
Keeping skin clean and optimally hydrated helps to visibly reduce the imperfections caused by this condition. That’s why it's important to opt for a professional treatment that purifies, mattifies, hydrates and smoothes the skin and helps minimize imperfections.