Usually, how long a patient with chronic hepatitis B can live needs to be judged according to the degree of disease progression, and cannot be generalized. Depending on the degree of progression of chronic hepatitis B patients, some patients with chronic hepatitis B are not seriously ill, and with regular treatment, their life expectancy will not be affected and will be the same as that of normal people. For some chronic hepatitis B patients who have not been treated, they may progress to cirrhosis or even liver cancer, which may affect their life expectancy, but the specific time to progress to cirrhosis and liver cancer is not fixed and can range from ten to several decades. Patients with chronic hepatitis B are recommended to visit the infection department of a regular hospital, and the general course of treatment is at least 4 years. The dietary principles for hepatitis B patients are three low, low salt, low fat, low sugar, and pay attention to balanced nutrition, avoid smoking and alcohol, keep a happy mood, pay attention to rest, avoid overexertion, choose appropriate exercise, and regularly review the five hepatitis B items and liver function.