Primary liver cancer may be caused by cirrhosis, viral hepatitis, hereditary factors, and alcoholism cannot be ruled out. 1. Cirrhosis: Cirrhosis is a common cause of primary liver cancer, and most of them are nodular cirrhosis developed by chronic hepatitis B and C. 2. Viral hepatitis: Hepatitis B virus infection or Hepatitis C virus infection in the liver may induce liver cancer if the virus damages the liver for a long time. 3. Hereditary factors: family history and hereditary factors are important risk factors for primary liver cancer, and there is a certain relationship with genes. 4. Alcohol abuse: primary liver cancer is probably due to long-term alcohol abuse, because alcohol contains a large amount of alcohol, which is likely to cause liver damage and induce alcoholic liver, and in serious cases, liver cancer may occur. To summarize, we need to do a good job in preventing primary liver cancer in our daily life, and eat more light and nutritious diet.