The state of human skin and their daily life factors, disease factors, environmental factors, daily skin care conditions and age factors are related, any of these aspects may cause large skin pores, dull yellow luster: 1, daily life factors: in daily life, long-term sleep deprivation, malnutrition, mental stress, mood, etc. can lead to the skin deterioration, skin pores Coarse, dull yellow luster and other phenomena; 2, disease factors: if you suffer from liver disease, anemia, oncological diseases, tuberculosis and other diseases can also appear such symptoms, the need to consult a doctor in a timely manner, to clarify the cause of the treatment; 3, environmental factors: the skin is often subjected to the wind and the sun or long-term in the cold, dry and other environments will cause damage to the skin, appearing skin pores, dull yellow luster situation; 4, Daily skin care: 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 sunscreen, will accelerate the skin condition worse; 5, age factors: with the age of the skin gradually aging, skin condition will gradually deteriorate, the color will become dull and yellowish, the skin pores and wrinkles pile up, which belongs to the normal physiological phenomenon, generally can not be reversed.