Most people experience skin problems between the ages of 12 and 25 when hormonal changes cause the most fluctuations in the body. Perhaps it is the most disturbing signal when step into those years of your life. They can form for a variety of reasons.
Normally, essential natural skin oil excreted by the sebaceous glands does its lubricating and moisturizing work and drains off. Oily skin not only attracts dusts but also continuously shed the dead cells. It can also involve infected or otherwise abnormal hair follicles.