Yellow lips should pay attention to the problem of hepatitis, which is a collective term for inflammation of the liver. It is usually caused by a variety of pathogenic factors, such as viruses, bacteria, parasites, chemical toxins, drugs, alcohol, autoimmune factors, etc., so that the liver cells are damaged, the function of the liver is damaged, causing a series of uncomfortable symptoms in the body, as well as abnormal liver function indicators. Due to the different causes that trigger hepatitis, although there are similar clinical manifestations, there are often significant differences in pathogenesis, serology, mechanism of injury, clinical course and prognosis, extrahepatic damage, diagnosis and treatment. It is important to note that most of the hepatitis we usually refer to in our life refers to viral hepatitis caused by hepatitis A, B, C and other hepatitis viruses. The differential diagnosis of yellowing of the lips and mouth: 1, chapped lips and mouth: one of the manifestations of labyrinthitis is chapped lips and mouth. Some allergic patients such as lipstick allergy, or people with poor digestion, will also have this performance. Of course, lack of water or B vitamins in the body can appear the same phenomenon. 2, the mouth and lips herpes: also called herpes simplex, is the herpes virus infection, common in the body resistance to reduce, such as overwork, cold, too partial to greasy or spicy food, excessive moisture, etc.. 3, yellow lips: yellow lips is uncommon, if the lips are yellow along with the face and body skin yellowing, you should be careful whether your liver problems, should promptly go to the hospital to check whether you have hepatitis.