Common causes of enlarged pores include exuberant sebaceous gland secretion, skin aging, and chronic inflammation. 1. Excessive sebaceous gland secretion: If the sebaceous gland secretion is relatively vigorous, or in hot weather for a long period of time, or eating spicy, stimulating and greasy food, etc., it is easy for the sebaceous gland secretion on the skin to be exuberant. In addition, if you do not pay attention to facial cleanliness, too much sebum accumulates in the pores, which will easily lead to the pores getting bigger and bigger. 2. Skin aging: with the growth of age, or the skin is subjected to long-term sun exposure, which leads to the breakage of collagen and fibrous protein in the skin, skin relaxation and aging, loose pore structure, self-repair ability to decline, easy to appear on the skin pores phenomenon. 3. Chronic inflammatory reactions: such as acne, seborrheic dermatitis, etc., due to the stimulation of inflammation, the pores on the skin are prone to become enlarged. It is recommended that patients pay attention to skin hygiene, pay more attention to rest, eat a light and easy to digest, if necessary, can go to the regular hospital for treatment.