There are about 120 million HBsAg-positive people in China, except for a small number of hepatitis, most of them are carriers. Hepatitis B carriers mostly refer to asymptomatic hepatitis B virus carriers, that is, those who have positive blood tests for hepatitis B markers, but no signs and symptoms of hepatitis, normal liver function tests, and no change after six months of observation. Carriers are a very complex group. They include: 1. Chronic hepatitis B virus carriers: positive serum HBsAg and HBVDNA, positive HBeAg or anti-HBe, but more than 3 consecutive follow-ups within 1 year, serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) are in the normal range, and liver histological examination is generally not significantly abnormal; 2. Inactive HBsAg carriers: serum HBsAg positive, HBeAg negative, anti-HBe positive or negative, HBV DNA undetectable or below the minimum detection limit, more than 3 consecutive follow-ups within 1 year, ALT and AST within normal range, no obvious abnormalities in liver histological examination. Inactive HBsAg carrier status has almost no effect on health and can work, study and live normally. Of course, there are individual carriers with some special circumstances, who may have liver damage or even more serious lesions. For hepatitis B virus carriers, the following measures are advocated: (1) No need to treat with drugs, even if the application of interferon, there is no response. Sometimes, on the contrary, too much and too many drugs are used, causing liver damage and leading to drug-related liver injury. (2) Regular checkups, including: five serological markers of hepatitis B virus, HBV DNA detection by polymerase chain reaction, liver function, liver B-mode ultrasound and fetoprotein test. every 4-6 months for those under 40 years old, and every 3-4 months for those over 40 years old. Check at any time if you have symptoms. (3) Although most carriers have no liver damage and will not develop cirrhosis or liver cancer, a small percentage still have liver damage, and a very small number even develop occult cirrhosis, so regular checkups are essential. For those with positive serum HBVDNA, mobilize them to have liver puncture examination if necessary to further confirm the diagnosis and carry out corresponding treatment. (4) Do not drink alcohol to prevent combined alcoholic liver disease; some foreign studies have shown that smoking can also promote the occurrence of liver fibrosis, so you should quit smoking; prevent hyperlipidemia and avoid combined fatty liver.