What Are the Symptoms of Hepatitis B?

Common symptoms of hepatitis B include generalized fatigue and weakness, decreased appetite with aversion to greasy foods, a dull or vague pain and a sensation of fullness or pressure in the liver area, jaundice (yellowing of the skin and sclera), and changes in the appearance of urine and stool. When hepatocytes are invaded and damaged by the hepatitis B virus, hepatic metabolic and digestive functions decline, leading to multisystem abnormalities. If obvious jaundice or frequent nausea and vomiting occur, prompt medical evaluation and treatment are essential.

1. Generalized fatigue and weakness: Following hepatitis B virus–induced hepatocyte destruction, energy synthesis is impaired, resulting in persistent fatigue and lethargy. Even minimal physical activity may cause exhaustion, and rest often fails to restore energy fully. In some individuals with chronic hepatitis B, fatigue may be the sole symptom—easily mistaken for ordinary tiredness and thus overlooked.

2. Decreased appetite and aversion to greasy foods: Hepatitis B impairs bile secretion by the liver, disrupting fat digestion. Affected individuals experience reduced appetite and nausea upon seeing or consuming fatty foods, often accompanied by abdominal distension. Prolonged reduction in food intake leads to inadequate nutrition, further exacerbating fatigue and physical debility.

3. Dull or vague discomfort or pain in the liver area: Hepatic inflammation and swelling stretch the liver capsule, causing a sensation of fullness or dull pain in the right upper quadrant of the abdomen. Symptoms may worsen after staying up late or consuming fatty meals. The pain is typically not severe colicky pain but rather intermittent and recurrent, making it easily confused with gallbladder or gastrointestinal disorders.

4. Jaundice (yellowing of the skin and sclera): Hepatocyte injury disrupts bilirubin metabolism and excretion, leading to bilirubin accumulation and subsequent jaundice. Gradual yellow discoloration of the sclera (“whites of the eyes”) and skin indicates significant hepatic damage. The degree of jaundice can also serve as an indirect indicator of the severity of hepatic inflammation.

5. Changes in urine and stool characteristics: Elevated serum bilirubin increases bilirubin concentration in urine, darkening its color to resemble strong tea. When biliary excretion is impaired, stool color lightens; in severe cases, stools may appear pale gray or clay-colored. Such alterations in urine and stool are critical clinical indicators of hepatitis B onset.

In daily life, avoid alcohol and mold-contaminated foods, maintain a light and nutritionally balanced diet, adhere to regular sleep-wake cycles, and undergo periodic liver function tests to monitor hepatic health proactively and minimize ongoing hepatocyte injury.