Hepatitis C is a viral hepatitis caused by hepatitis C virus infection, with clinical symptoms mainly in the digestive system. Hepatitis C can be transmitted through blood, sexual contact and mother-to-child route of infection, chronic higher hepatitis virus, which can cause acute and chronic hepatitis, and even develop to cirrhosis: I. Symptoms: Hepatitis C infection can cause acute hepatitis, chronic hepatitis, asymptomatic carriage, and in a few patients, severe hepatitis, liver failure, etc. 1. Acute hepatitis: most of them are acute hepatitis without xanthogranuloma, manifested as weakness, anorexia, urine color darkening, and pain in the liver area. A small number of acute jaundice type hepatitis, jaundice is mild or moderately elevated, may appear nausea, decreased appetite, general weakness, yellow urine and eyes, etc.; 2, chronic hepatitis: symptoms are mild, mostly non-specific symptoms, such as weakness, abdominal distension, right upper abdominal pain, learning or work energy loss, etc.; 3, asymptomatic carriers: carrying hepatitis C virus, but no obvious clinical symptoms and biochemical indicators of abnormalities. Second, the harm: the chronicity rate of hepatitis C is 55%-85%. If chronic hepatitis continues to progress, it can develop into cirrhosis, with symptoms related to decreased liver reserve function and portal hypertension. Once it develops into cirrhosis, it is easy to cause liver cancer, and the annual incidence of hepatitis C-related liver cancer is 2%-4%.