Low blood pressure in patients with hepatitis B is related to the loss of body fluids, diseases and drugs. 1. Loss of body fluids: if the patient has diarrhea, vomiting and other phenomena, which lead to rapid loss of body fluids in a short period of time, low blood pressure may occur. 2. Disease: Hepatitis B patients with abnormal liver function can cause disorders in body functions, which can lead to abnormal blood pressure. At the same time, the disease will lead to poor nutrition and malnutrition, which will lead to the appearance of low blood pressure. 3. Drug influence: if patients take antihypertensive drugs, low blood pressure will also appear in a short time. Hepatitis B virus carries no direct relationship with low blood pressure, and low blood pressure is not one of the symptoms of hepatitis B. Hepatitis B patients with symptoms of low blood pressure should go to the hospital as soon as possible for examination, and it is recommended to improve the cardiac ultrasound and endocrine systematic examination to clarify the reasons for the lowering of blood pressure, and to carry out treatment under the guidance of doctors to ensure that the blood pressure returns to normal.