Acne, a skin condition, occurs when secretions from the skin's sebaceous glands (oil glands) clog the tiny skin openings for hair follicles. Plugged pores can develop into tender inflammations (pimples) which can become larger and form into small, deeper nodules and cysts. In few instances this leads to infection and inflammation.The more sebum is produced, the easier it is for the hair follicles to become clogged. Getting rid of acne is only part of the battle. Post acne, there may still be dark spots or scars and open pores or pits that can ruin your skin complexion.