Drinking a large amount of alcohol, even for just a few days, can lead to a build-up of fats in the liver. This is called alcoholic fatty liver disease, and is the first stage of Alcohol-related liver disease (ARLD). Fatty liver disease rarely causes any symptoms, but it's an important warning sign that you're drinking at a harmful level. Fatty liver disease is reversible. If you stop drinking alcohol for some time (months or years), your liver should return to normal.