Common causes of enlarged pores include exuberant secretion of sebaceous glands, skin aging, and chronic inflammatory reactions. 1. Excessive sebaceous gland secretion: Some people are born with exuberant sebaceous gland secretion, which can lead to larger pores; in addition, due to weather factors, such as hot and stuffy environment, sebaceous metabolism is exuberant, or spicy and stimulating food, stimulate the skin sebaceous gland secretion, sebum, will also make pores bigger. 2. Skin aging: With age, the body’s various tissues and organs gradually aging, the skin metabolism will also become slower, with the loss of collagen, hyaluronic acid and other substances, the skin will become loose and inelastic, pores will also become large. In addition, usually do not pay attention to sunscreen, long-term exposure to sunlight, will damage the skin, the skin’s self-repair ability to decline, pores become larger. 3. Chronic inflammatory reaction: If the skin has inflammatory infections, in the long run, the skin will be affected by inflammation, pores become large, skin quality deterioration. Mostly seen in facial recurrent acne. It is recommended that patients usually pay attention to skin care, if necessary, to the regular hospital dermatology consultation, follow the doctor’s instructions reasonable treatment.