What is the most common cause of cirrhosis?

There is no such thing as "the most common cause of cirrhosis." Common causes of cirrhosis include viral hepatitis, alcoholic liver disease, non-alcoholic fatty liver disease, autoimmune liver disease, and drug- or toxin-induced liver injury. If symptoms such as fatigue, jaundice, or ascites occur, seek medical attention promptly for accurate diagnosis.

1. Viral hepatitis: Chronic infection with hepatitis B or C viruses is a major cause. Persistent viral replication damages liver cells, leading to inflammation and necrosis. Over time, this progresses to liver fibrosis and eventually cirrhosis.

2. Alcoholic liver disease: Long-term heavy alcohol consumption can cause fatty degeneration and necrosis of liver cells, leading to alcoholic hepatitis. Continued drinking will gradually progress to liver fibrosis and cirrhosis.

3. Non-alcoholic fatty liver disease: Factors such as obesity, diabetes, and hyperlipidemia lead to excessive fat accumulation in liver cells, triggering inflammation and fibrosis, which may progress to cirrhosis over time.

4. Autoimmune liver disease: Immune system dysfunction causes the body to attack its own liver cells, resulting in chronic inflammation and damage that may progressively lead to cirrhosis.

5. Drug- or toxin-induced liver injury: Long-term use of hepatotoxic medications or exposure to liver-damaging toxins can cause ongoing liver cell damage, gradually progressing to liver fibrosis and cirrhosis.

Treatment requires addressing the underlying cause—such as antiviral therapy, alcohol cessation, or weight reduction—along with supportive use of liver-protective medications. For care, maintain regular作息 (daily routines), follow a low-salt, low-fat diet, avoid overexertion and factors that harm the liver, and undergo regular monitoring of liver function and imaging studies.