There are physiological and pathological causes of dull yellow skin in girls. Physiological causes such as exposure to the sun and other common pathological factors are endocrine disorders, anemia, liver disease, biliary tract disease and so on. 1. Physiological reasons: for example, excessive consumption of some carotene-rich foods, prolonged exposure to the sun, a long time do not drink water, can cause the phenomenon of yellowish skin. When the formation of good dietary habits and good sunscreen, the phenomenon of yellowish skin will improve. 2. Endocrine disorders: will cause the female skin oil secretion imbalance, if not timely clean up the skin, can lead to local pore blockage, so that the skin residue can not be discharged, and then appear local skin yellowish situation. 3. Anemia: especially chronic hemolytic anemia, can cause bilirubin metabolism disorder, resulting in total bilirubin and indirect bilirubin increase, which leads to the phenomenon of yellowish skin, and even sclera yellow stain. 4. Liver disease: when patients have hepatocellular jaundice, due to the damage of liver cells, which leads to a decrease in the liver’s ability to convert and excrete bilirubin, bilirubin enters into the skin with the blood circulation, which causes yellowing of the skin and mucous membranes, resulting in a yellowish color of the skin. 5. Biliary tract diseases: for example, bile duct stenosis and obstruction will cause bile and bilirubin to enter the bloodstream without normal excretion, which will also lead to yellowing of the skin and dark yellow phenomenon. All in all, if the skin is dark yellow caused by pathological factors, it is recommended to consult a doctor in time and follow the doctor’s instructions to actively treat the original disease.