Blackheads appear when the hair follicles on the skin become clogged due to the secretions of the sebaceous glands and dead skin cells, and often affect the skin face, back, chest and arms. The tendency to the emergence of acne can be inherited. Acne usually appears during adolescence in the form of small red bumps, sometimes large cysts and nodules. Usually after puberty acne disappear on their own. Acne is more common in men than in women. Acne can take the form of blackheads (open comedones), which is extended and clogged skin pores. In this video you can see how huge Blackhead squeezed on foot.