Portal vein hemorrhage has symptoms such as vomiting blood, blood in the stool, black stool, ascites, and splenomegaly. Portal vein usually ruptures and bleeds due to phase injury during surgery or due to opening of collateral circulation due to portal hypertension. When the pressure of collateral circulation increases, it will lead to rupture and bleeding of the vein, which will cause corresponding symptoms such as vomiting blood, blood in the stools, black stools, and so on. If the patient bleeds too much and too fast, it may also cause hemorrhagic shock, hemoglobin drop, dizziness and other symptoms, and even coma may occur. If portal vein hemorrhage is caused by cirrhosis, symptoms such as massive ascites, splenomegaly, hypersplenism, hepatic insufficiency, hepatic encephalopathy, hypoalbuminemia, etc. may also occur. If portal vein hemorrhage occurs, you should go to the hospital in time and under the guidance of the doctor for treatment to avoid delaying the condition.