Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Portal hypertension ?
    ### Response:
    Portal hypertension is abnormally high blood pressure in branches of the portal vein, the large vein that brings blood from the intestine to the liver. Portal hypertension itself does not cause symptoms, but complications from the condition can lead to an enlarged abdomen, abdominal discomfort, confusion, drowsiness and internal bleeding.
    