In clinical work, it is found that many liver cancer patients know that they have a history of hepatitis B, and every time they have a physical examination, they simply check a hepatitis B two-to-half, and find out that it is hepatitis B mini-three-positive, and then they do not care about it, including a lot of physicians who are not hepatology specialists, and they also simply think so. In fact, many patients with hepatitis B is that he has already found liver cancer, hepatitis B is also small triple Yang, but a check of hepatitis B virus DNA, but high scary! Therefore, it is recommended that patients with hepatitis B surface antigen positive, every 3-6 months physical examination must check the hepatitis B virus DNA, if this result is high, suggesting that the body of the hepatitis B virus is active, when higher than 1,000, need to take antiviral treatment. Also, especially couples who have a history of hepatitis B and are planning to get pregnant should have a good pre-pregnancy counseling before getting pregnant!