Pores are openings in the skin where oil is excreted to lubricate the surface of the skin.
Occasionally there can be too much oil produced, which results in the pores appearing larger and being perceived as a blemish on the skin. The best first step in treating these is using an at home skin care regime designed to control the oil production in your skin. Typically using a cleanser containing salicylic acid, which is able to penetrate through oil to reach the base of the pore, will help to unclog the pores and reduce the appearance of the pores. Using a scrub once or twice per week to exfoliate the skin will also usually help. If these simple at home measures do not work for you then you may want to consider a medical procedure, although you should keep in mind that no medical procedure is universally effective at reducing pore size.