The liver performs many important functions, including:
- Making blood proteins that aid in clotting, transporting oxygen and supporting the immune system
- Manufacturing bile, a substance needed to help digest food
- Helping the body store sugar (glucose) in the form of glycogen
- Ridding the body of harmful substances in the bloodstream, including drugs and alcohol
Breaking down saturated fat and producing cholesterol
Many different diseases and conditions cause liver failure, including Hepatitis B and C, non-alcoholic fatty liver disease, alcohol abuse and hemochromatosis.
In many cases, chronic liver failure results from cirrhosis. Cirrhosis is the scarring of the liver from repeated or long-lasting injuries, such as from drinking alcohol excessively over a long period of time or chronic hepatitis infection. As scar tissue replaces healthy liver tissue, the liver loses its ability to function.
Acute liver failure is most often caused by:
- Viral infections, such as Hepatitis B.
- The overuse of certain drugs or toxins, like acetaminophen (Tylenol®), and the use of other medications (including certain antibiotics, antidepressants, anti-seizure medications, man-made hormones and antifungal drugs) and herbs (green tea extract and kava).
- Metabolic (biologic) or vascular (vessels that carry fluids, such as arteries) disorders, such as Wilson disease and autoimmune hepatitis.
The symptoms of liver failure often look like symptoms of other medical conditions, which can make it hard to diagnose in its early stages. Symptoms get worse as your failing liver continues to get weaker.
- Chronic liver failure, or liver failure that occurs over many years, may cause:
- Loss of appetite
- Vomiting blood
- Blood in the stool
- As liver failure advances, symptoms become more severe. In later stages, symptoms of liver failure may include:
- Jaundice (yellowing of the skin and eyes)
- Extreme tiredness
- Disorientation (confusion and uncertainty)
- Fluid buildup in the abdomen and extremities (arms and legs)
- Sometimes, the liver fails suddenly, which is known as acute liver failure. People with acute liver failure may have the following symptoms:
- Changes in mental status
- Musty or sweet breath odour
- Movement problems
- Loss of appetite
- The general feeling of being unwell