Your liver is a very important organ. It helps you break down food and can help fight germs. Your liver also removes harmful chemicals from the blood. Your liver may be damaged and suddenly stop working. This is acute liver failure or ALF. Harmful substances can build up in your body when your liver is damaged. This can cause more harm to your liver. This can also harm other parts of your body. Many things can cause ALF. Drinking too much alcohol, taking too much of certain drugs, or using some herbs may harm your liver. Other health problems like viruses or poor nutrition can also harm your liver. This can be a very serious condition.