There are several reasons for the yellowing of the face: First, liver and gallbladder diseases, such as common obstructive jaundice and hepatitis, cause the yellowing and darkening of the face, while some patients have yellow eyes and white stools. Second, anemia, especially long-term anemia in women and make the face yellowish, yellowish. Third, aging, with the increase of age, the skin gradually aging, pigmentation, yellowing. Fourth, work stress, poor sleep, mostly seen in daily life, mental stress and not effectively relieved, the mood becomes agitated, the metabolism of the skin can have an impact. Sleep disorders can also lead to unhealthy skin and the appearance of dull yellow.