The so-called couple cancer refers to the clinical phenomenon that both husband and wife suffer from cancer at the same time or at different times, for example, the husband suffers from lung cancer and the wife also suffers from lung cancer, the husband suffers from liver cancer and the wife also suffers from liver cancer, and so on. The emergence of cancer in husband and wife is not due to mutual transmission of cancer, because clinical research shows that cancer is not contagious, but the emergence of cancer in husband and wife is due to the influence of the same bad eating habits, living habits and environmental cancer-causing factors after long term living. For example, if a husband smokes and his wife suffers from hepatitis, and if a husband suffers from hepatitis and his wife suffers from hepatitis through contagion, the hepatitis will develop into liver cirrhosis and eventually liver cancer after long-term carcinogenic factors, so both spouses suffer from liver cancer at the same time.