What does abnormal liver function mean?

Abnormal liver function refers to structural and functional changes in the liver caused by damage from certain pathogenic factors, leading to impaired physiological and metabolic functions. This is usually indicated by liver function test results outside the normal range, such as elevated levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST), and gamma-glutamyl transferase (GGT). Abnormal liver function may be caused by various factors, including viral hepatitis, fatty liver disease, drug-induced hepatitis, and alcoholic hepatitis. Patients may experience gastrointestinal symptoms (e.g., loss of appetite, nausea, vomiting), liver-related manifestations (e.g., hepatomegaly, tenderness), and systemic symptoms (e.g., fatigue, easy exhaustion). Prompt diagnosis and treatment are necessary to prevent further progression of the condition.