Functional cure refers to the complete suppression of the virus in the body of the infected person to ensure the normal performance of the immune function of the body of the infected person, so as to achieve the effect that even if the infected person no longer receives any relevant treatment, it is difficult to detect the corresponding virus in the blood of the patient by conventional methods. Functional cure is often applied to patients with chronic viral hepatitis B. After completing a limited course of treatment, serum HBsAg and HBV DNA are persistently undetectable, and HBeAg is negative, with or without HBsAg serological conversion. If patients experience discomfort, they should go to the hospital in time and follow the doctor’s instructions for treatment to avoid delay. In daily life, you can exercise appropriately and eat more high-quality protein food, which will help to improve your immunity.