The invasion of the right hepatic vein mainly refers to the compression of the venous blood vessels, which is usually related to hepatitis, thrombosis, liver cancer and so on. 1. Hepatitis: Most of the patients get hepatitis due to hepatitis B virus infection, and when the number of viruses increases and invades the venous blood vessels, it will result in the invasion of the vein. 2. Thrombosis: after deep vein thrombosis due to various causes, it may invade the right hepatic vein and compress the surrounding blood vessels, which will cause venous invasion. 3. Hepatocellular carcinoma: Mostly in advanced stage of hepatocellular carcinoma, when the cancer cells metastasize and spread to the portal vein or hepatic vein, the right hepatic vein will be invaded. If the invasion of hepatic portal vein is detected and the cause is not clear, it is recommended to consult a doctor in time and under the guidance of a professional doctor, carry out liver enhancement CT and pathological biopsy for diagnosis and analysis, and then carry out treatment after understanding the cause of the disease.