Facials are relaxing treatments designed to treat the skin and revive your being making you look and feel better afterwards common and annoying blackheads occur when your pores become clogged with excess sebum an oil created by the sebaceous glands that keeps skin supple and dead skin cells the difference between a black head and a white head is simply whether or not the pore is open or closed if the pore is open the plug of sebumskin cells oxidizes as it is in contact with the oxygen