Hepatitis B refers to an infectious disease caused by hepatitis B virus with liver damage as the main cause, hepatitis B virus carriers basically have no obvious clinical signs and symptoms, the clinical manifestations of the human body infected with hepatitis B virus can be as follows: 1. Acute hepatitis: most can recover on their own, the course of the disease in about 2-4 months, the patient’s main manifestations are chills, fever, malaise, loss of appetite, nausea, anorexia, abdominal discomfort, pain in the liver area, etc., jaundice type can also be seen in the gradual deepening of the color of the urine as well as the yellowing of the skin and sclera. 2. Chronic hepatitis patients with disease duration more than 6 months can be clinically categorized into mild, moderate and severe, with common symptoms such as mild or severe malaise, general discomfort, loss of appetite, discomfort or pain in liver area, abdominal distension, low-grade fever, etc. The physical signs are dullness, nausea, anorexia, abdominal discomfort, and pain in liver area. Physical signs are dark color, yellow stain of sclera, spider nevus, liver palms, hepatosplenomegaly, and in severe cases, deepening jaundice, abdominal fluid, lower limb edema, bleeding tendency and hepatic encephalopathy. 3. Severe hepatitis: the condition progresses rapidly after infection. 4. Cirrhosis after hepatitis B is the result of the development of chronic hepatitis. If hepatitis B is diagnosed, professional treatment should be sought in time to avoid delay.