Liver disease refers to any condition that affects the liver's function or structure. The liver is a vital organ in the body responsible for performing various functions such as detoxification, protein synthesis, and metabolism regulation. When the liver becomes damaged or diseased, it can lead to serious health problems. Liver disease can be caused by various factors including viral hepatitis, alcohol abuse, autoimmune disorders, genetic disorders, and exposure to toxins. Symptoms of liver disease may include fatigue, nausea, vomiting, abdominal pain, jaundice, and fluid retention. Treatment for liver disease depends on the underlying cause and severity of the condition and can range from medication to surgery or a liver transplant in severe cases.