Liver fibrosis is a condition where healthy liver tissue is replaced by scar tissue due to long-term damage. This damage can be caused by factors such as chronic alcohol consumption, viral hepatitis, or non-alcoholic fatty liver disease. As the fibrosis progresses, the liver's ability to function properly can be impaired. If left untreated, liver fibrosis can lead to more severe conditions like cirrhosis, which is a more advanced scarring of the liver. Early detection and management of the underlying causes are crucial to prevent further liver damage and maintain overall health.