People’s skin condition is related to their daily life factors, disease factors, environmental factors, daily skin care conditions and age factors, any of these aspects may cause large skin pores, dull yellow lusterless: 1, daily life factors: in daily life, long-term sleep deprivation, poor nutrition, mental stress, poor mood, etc. can lead to skin deterioration, skin pores 2, disease factors: if suffering from liver disease, anemia, tumor disease, tuberculosis and other diseases can also appear such symptoms, you need to promptly seek medical advice to clarify the cause of treatment; 3, environmental factors: skin often suffer from wind and sun or long-term in the cold, dry environment can cause damage to the skin, the appearance of large skin pores, dull yellow luster; 4. Daily skin care condition: If you do not pay attention to daily skin care, do not carefully clean the skin, do not apply skin care products, do not pay attention to sun protection, will accelerate the deterioration of the skin state; 5, age factor: with the growth of skin aging, the skin state will gradually deteriorate, the face will become dull yellow and lusterless, skin pores and wrinkles accumulate, which is a normal physiological phenomenon, generally can not be reversed.