Bad liver refers to abnormalities or lesions in the liver area. When liver function is abnormal, there may be no obvious symptoms if the degree is mild, but some patients may show general weakness, loss of appetite, bloating, diarrhea, or abnormal liver metabolism and detoxification will show yellow urine and yellow face, especially around the eyes and eyes, which may be accompanied by itchy skin. If the synthesis of albumin or coagulation function is abnormal, it will lead to swelling, abdominal distension or spontaneous bleeding, such as bleeding gums and oral mucosa. Patients are advised to make timely adjustments to avoid further development of liver function abnormalities into other liver diseases. As liver function abnormalities gradually worsen, they can develop into liver diseases. There may be dilated capillaries on the body surface, spider nevi or liver palms, or jaundice, presenting with yellow skin and fever. There may also be discomfort in the right upper abdomen, pain in the liver area or distension in the upper abdomen, which may affect the digestive system in severe cases, resulting in aversion to grease, nausea and vomiting or even bleeding in the upper gastrointestinal tract, suggesting that there is already some degree of pathology in the liver area, which requires prompt medical attention. If the liver disease is further aggravated, serious diseases such as liver cirrhosis and liver cancer may appear. When cirrhosis is severe, ascites, portal hypertension, hypersplenism or esophageal varices may occur, even leading to liver encephalopathy. If a tumor grows in the liver area, when the tumor invades the diaphragm, it can cause pain in the right shoulder or right side of the back. If the lung is involved, it may lead to difficulty in breathing and chest tightness. The condition is more serious at this point, so patients are advised to observe their own changes, pay attention to liver care and timely treatment if problems are found.