Because the white of the eye is the sclera, yellowing is commonly associated with yellowing of the sclera, which is mainly related to the digestive system, depending on whether there is a disease of the liver and gallbladder system. Liver and gallbladder diseases can elevate bilirubin in the blood, leading to yellowing of the sclera. Another situation is because the surface of the sclera is covered with transparent bulbous conjunctiva, with age or long-term outdoor wind and sand stimulation, the bulbous conjunctiva will gradually thicken, degenerate, lose transparency, and may form a layer of yellowish film, with no other symptoms of discomfort in the whole body. Secondly, when eye fatigue or chronic inflammation, the eyes of the slight conjunctival congestion may be manifested as a yellowish color, can be cold compresses or control of inflammation, can improve the eyes yellowish.