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Alcohol dilates peripheral blood vessels, but has been known to actually. constrict some blood vessels in the brain, lowering the oxygen content. Alcohol dilates peripheral blood vessels, but has been known to actually  constrict some blood vessels in the brain, lowering the oxygen content.
1. Liver disease. Liver damage such as caused by alcohol abuse can lead to blood pressure problems in your abdomen, which forces water out of your blood vessels and into your abdominal cavity â the space around your abdominal organs.