The main reasons for dull skin tone are the following: 1, due to endocrine disorders, facial skin oil secretion imbalance, no timely cleaning of the skin leading to local pore blockage, skin residues can not be discharged, there will be local pigment dull yellow colorless. 2, often eat fried food, so that the skin secretions become sticky, not conducive to the excretion of dirt or fat thus leading to dull skin tone. 3, the use of unsuitable skin care products skin care, the skin can not fully absorb the ingredients of skin care products, and finally lead to the use of repeated long-term use will lead to dull skin tone. 4, liver disease, the patient has hepatitis, hepatitis, the skin can not fully absorb the nutrients. The skin can not fully absorb the ingredients of skin care products, and finally lead to excess nutrients in the face skin, so repeatedly used for a long time will lead to unbalanced facial complexion. 4, liver disease, patients with hepatitis, cirrhosis or liver metabolic disease, will appear dull face, dull complexion. 5, spleen weakness, spleen weakness when the body’s fat is difficult to normal Fat metabolism, the possibility of a dull yellow complexion is greater.