There are various causes of yellowing around the mouth, usually due to skin and mucous membrane diseases, liver function damage, insufficient blood supply to the heart muscle, anemia and other reasons. 1. Skin and mucous membrane diseases: such as lipitis, perioral dermatitis, perioral eczema, etc., the onset of ultraviolet radiation, wind and heat stimulation, infection, allergies and other factors related to the phenomenon of yellowing around the mouth. 2. Hepatic impairment: viral hepatitis, cirrhosis and other liver diseases often damage liver cells, causing abnormal bilirubin metabolism and jaundice, which may lead to yellowing of the skin around the mouth and other locations, and yellowing of the sclera can also occur. 3. Insufficient blood supply to myocardium: if myocardial ischemia patients have transient myocardial ischemia within a short period of time or myocardial blood supply is insufficient due to various factors of shock, the color of the lips and mouth will be white, pale or yellowish-white. 4. Anemia: Anemia is a clinical syndrome that occurs when the volume of red blood cells in the peripheral blood is lower than normal, and yellowing around the mouth may occur. The symptoms of yellowing around the mouth, you should go to the regular hospital in time to check, in the doctor’s diagnosis and treatment of the cause.