Scar tissue from cirrhosis may block the proper flow of blood from the intestines through the liver. The scarring can lead to increased pressure in the veins that supply this area. This is called portal hypertension. It can lead to other complications, which may include:
Hepatopulmonary syndrome. Portal hypertension can cause lung problems, such as widening of the blood vessels in the lungs. This causes the blood to move too swiftly through the lungs to pick up enough oxygen.
Hepatic hydrothorax. Fluid can build up between the lungs and the chest (pleural effusion) and press on the lungs.