Sclera is commonly known as the white eyeball of the eye, and its yellowing may be due to physiological reasons, or it may be related to hemolytic jaundice, liver disease, and so on. 1. Physiological reasons: with age, by ultraviolet rays or long-term exposure, the sclera will gradually begin to yellow, which is a normal physiological phenomenon. If there is no obvious discomfort, no special treatment is needed. 2. Hemolytic jaundice: due to the destruction of a large number of red blood cells in the blood, the bilirubin produced exceeds the compensatory capacity of the liver, which will cause yellowing of the sclera, usually accompanied by yellowing of the skin. 3. Liver disease: for example, jaundice hepatitis, which will cause relatively high level of bilirubin in the blood to be deposited in the sclera, thus causing yellowing of the sclera. When the white of the eye is yellow, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions and then further relevant examination, with the help of the doctor to clarify the cause, and targeted treatment or treatment.