Hepatitis B is caused by hepatitis B virus infection and is a chronic infectious disease. Since it is impossible to eradicate the hepatitis B virus from the patient’s body, it cannot be completely cured, but only control the patient’s condition from deteriorating. After hepatitis B virus infects the human body, it is very likely to cause chronic infection. With chronic infection, the body’s immune system does not react strongly enough to remove it. When the hepatitis B virus escapes from the immune system, it can enter the liver cells, leading to a chronic state of persistent infection. The main application of antiviral drugs nucleoside analogs (e.g., entecavir, etc.) for the treatment of hepatitis B can inhibit the replication of the virus for a long period of time, but part of the virus still exists in the liver cells and cannot be completely removed. Therefore, the virus will continue to multiply after the antiviral drugs are stopped, making hepatitis B more difficult to cure. When patients suffer from hepatitis B, they should pay attention to rest, avoid exertion, and take reasonable treatment under the guidance of doctors.