Pore size is mainly related to sebaceous gland secretion, skin aging, improper care, and requires drugs, medical cosmetics, etc. combined with lifestyle adjustments to improve. 1, sebaceous gland secretion: sebaceous gland secretion is regulated by hormones, after entering puberty, androgen level or activity increases, sebum secretion increases, easy to produce pore blockage, pile up gradually will pores; at the same time, if the cleaning is not in place, the pores The possibility of clogging is even greater, dust and oil mix easily infected, causing acne, folliculitis, mite dermatitis, etc. At this time, in addition to larger pores, there will also be red spots, rashes, itching symptoms; 2, skin aging: with the increase in age, the skin will gradually aging, relaxation, collagen loss, the support of the hair follicles weakened, hair follicles collapse, showing larger pores. In addition, long-term sun exposure, ultraviolet radiation, etc., will also make the skin aging, pore size; 3, dry skin, dehydration: dry skin, epidermal cell dehydration, etc., can make the facial skin sagging dull, but also the performance of pore size; 4, other: inappropriate use of cosmetics, skin care products, skin stimulation, can reactively cause pore size. Frequent use of nose stickers, blackhead sticker products, or squeezing hair follicles with your hands, also tend to enlarge the pores. The appearance of larger pores, to strengthen daily care, pay attention to cleaning, hydration, maintain the water-oil balance, so that the skin is not too dry nor too greasy, at the same time, you can also choose a safe and appropriate medical skin care products, as well as through photoelectric treatment and other ways to improve the skin.