Hepatitis B primarily manifests in two aspects: the patient's subjective symptoms and physical signs. Generally, after contracting hepatitis B, patients often experience fatigue, weakness, and frequent dreams, along with noticeable gastrointestinal symptoms such as loss of appetite, nausea, aversion to greasy foods, and abdominal bloating. Some patients may also experience discomfort, dull pain, or tenderness in the upper right abdomen. Patients with hepatitis B often exhibit signs of liver disease, including jaundice, yellowing of the sclera and skin, and dark urine. Additionally, hepatosplenomegaly (enlargement of the liver and spleen) may occur. Serological tests typically show positive results for hepatitis B surface antigen, and liver function tests reveal abnormal indicators such as elevated transaminase and bilirubin levels.