An internal portal vein diameter of 1 cm is the upper limit of normal values for the portal vein and cannot be used alone as a basis for determining disease, and therefore cannot be used to determine the need for treatment. The diameter of the portal vein in normal people is generally between 0.6-1.0 cm, and the maximum can be up to 1.5 cm.1.0 belongs to the upper limit of the normal range, and generally also needs to be based on whether there is chronic liver disease, whether there is portal obstruction, or whether there is an increase or decrease in the size of the liver and other factors to make a comprehensive judgment, if it is not caused by the disease, there is no need to have special treatment in general. Elevated portal vein resistance is commonly caused by diseases, such as hepatitis, cirrhosis, fatty liver, hepatocellular carcinoma, intrahepatic bile duct stones or hepatic cysts and other diseases may cause portal hypertension. If it is comprehensively judged to be venous hypertension caused by diseases, then the diseases need to be treated. It is recommended that patients go to regular hospitals for further examination, and if diagnosed as a result of disease, it is recommended that patients under the guidance of a professional doctor to carry out the relevant treatment.