The cloudy yellowing of the whites of the eyes at age 30 should be treated in different ways according to different causes. Common causes include physiological causes, eye diseases, liver and gallbladder diseases, etc., and treatments include medication and surgery. 1. Physiological causes: large amounts of food containing carotenoids, such as oranges, can cause yellowing of the whites of the eyes, usually no special treatment is needed, and stop overconsumption of the food can be. 2. Eye diseases: subconjunctival hemorrhage caused by high blood pressure and other causes will also be manifested in the yellowing of the whites of the eyes, and can be treated with drugs such as sodium vitrate eye drops. 3. Liver and gallbladder diseases: Liver and gallbladder diseases can cause elevated bilirubin in the blood, resulting in yellowing of the whites of the eyes. Different treatments should be chosen according to different types of diseases, such as viral hepatitis treated with drugs such as lamivudine. Surgery may be needed if the condition is severe. All of the above medications should be used under a doctor’s supervision. Yellowing of the whites of the eyes may also be caused by other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy.