Blackheads are basically a kind of acne. Although sometimes associated with dirt, they are actually caused when dead skin cells and keratin block skin pores, which is effectively a blockage of the sebaceous glands below the skin. As a result, there is a build up of sebum, which then darkens and hardens as it gets oxidized. To some extent, dirt does aggravate the condition, as does excessive use of make up. Therefore, these are two things that you need to address. Wash your face regularly using plain water, or maybe a mild soap. Use make up sparingly, and wash off the make up as soon as you return home. You can also steam your face at night, before going to bed. This will both clean and open up the pores.
In addition, you can use some home made face masks and face washes. Mix egg white and honey, adding a pinch of turmeric powder if you like. Apply this mixture to your face and wash it off after half an hour. You can also make a paste of cinnamon powder and lemon juice or honey, and apply it to your face once a day, for half an hour. In addition, when blackheads appear, crush a clove of garlic and gently rub the clove on the blackhead.
answered by G M