Jaundice — Causes, Types, Diagnosis & Treatment Guide — Symptoms, Causes & Treatment | MyMedicPlus

Jaundice (icterus) is the yellowish discolouration of the sclera (whites of the eyes — most sensitive clinical indicator), skin, and mucous membranes caused by elevated serum bilirubin levels above approximately 34-50 micromol/L (2-3 mg/dL). Scleral icterus is visible at bilirubin levels above 34 micromol/L, while skin yellowing typically requires levels above 51 micromol/L. Bilirubin is the breakdown product of haem from aged red blood cells, processed in the liver, and excreted in bile. Jaundice is classified anatomically as pre-hepatic (haemolysis — excess bilirubin production), hepatic (hepatocellular dysfunction — impaired uptake, conjugation, or excretion), and post-hepatic/cholestatic (biliary obstruction — impaired bile excretion into the duodenum). Each category has distinct causes, clinical features, and investigation pathways. Jaundice is always a significant symptom requiring medical evaluation — it is never normal in adults beyond the neonatal period and can indicate serious pathology.

Pre-hepatic jaundice (unconjugated hyperbilirubinaemia — elevated indirect bilirubin): haemolytic anaemias (sickle cell disease, hereditary spherocytosis, autoimmune haemolytic anaemia, glucose-6-phosphate dehydrogenase deficiency); haemolytic transfusion reactions; malaria; ineffective erythropoiesis (megaloblastic anaemia); large haematomas being reabsorbed; and Gilbert's syndrome (benign genetic condition — UDPGT1A1 variant causing mild unconjugated hyperbilirubinaemia, present in 5-10% of the population, typically triggered by fasting, illness, or exercise). Hepatic jaundice (hepatocellular damage): viral hepatitis A, B, C, D, E; alcoholic hepatitis; non-alcoholic steatohepatitis; autoimmune hepatitis; paracetamol overdose; drug-induced liver injury; ischaemic hepatitis (circulatory failure); Wilson's disease; and haemochromatosis. Post-hepatic/cholestatic jaundice (conjugated — direct bilirubin elevation, with dark urine and pale stools): choledocholithiasis (common bile duct stones — most common cause); biliary strictures; cholangiocarcinoma; pancreatic cancer; primary sclerosing cholangitis; primary biliary cholangitis (PBC); and post-surgical bile duct damage.

The cardinal feature is yellowish discolouration of the sclera and skin. Associated symptoms vary crucially by aetiology. Pre-hepatic jaundice (haemolytic): anaemia symptoms (fatigue, pallor, breathlessness), mild jaundice, splenomegaly, normal or pale urine, normal stool colour. Hepatic jaundice: progressive jaundice, fatigue, anorexia, nausea, right upper quadrant discomfort, dark urine (tea or cola coloured from bilirubin), pale stools (clay-coloured from reduced bilirubin excretion), and constitutional symptoms (fever in hepatitis, cachexia in malignancy). Signs of chronic liver disease: spider naevi, palmar erythema, leukonychia, finger clubbing, hepatomegaly, splenomegaly, ascites, and caput medusae. Cholestatic jaundice: progressive deep jaundice, pruritus (severe itching from bile salt deposition in skin — can be debilitating), pale stools, dark urine, weight loss (malignant obstruction), and pain (biliary colic from gallstones). Painless progressive jaundice in an older person is pancreatic cancer until proven otherwise. Fever, jaundice, and right upper quadrant pain (Charcot's triad) indicate ascending cholangitis — a medical emergency requiring immediate antibiotics and biliary decompression.

Liver function tests (LFTs): ALT and AST (hepatocellular markers — markedly elevated in viral/toxic hepatitis); ALP and GGT (cholestatic markers — elevated in biliary obstruction and PBC); bilirubin (total, direct/conjugated, and indirect/unconjugated — fractionation guides classification); albumin and prothrombin time (markers of synthetic function — impaired in significant hepatocellular disease). FBC: anaemia and reticulocytosis (haemolysis), thrombocytopenia (portal hypertension). Abdominal ultrasound: first-line imaging — identifies bile duct dilatation (indicates post-hepatic obstruction), gallstones, hepatic masses, liver texture changes (cirrhosis). CT abdomen and pelvis (pancreatic protocol): detects pancreatic and biliary malignancy with staging. MRCP (MR cholangiopancreatography): non-invasive gold standard for imaging the biliary tree — identifies stones, strictures, and anatomical variants. ERCP (endoscopic retrograde cholangiopancreatography): therapeutic — removes common bile duct stones, places biliary stents for strictures, and takes brush cytology for diagnosis. EUS (endoscopic ultrasound): superior for detecting small pancreatic masses, periampullary lesions, and bile duct stones. Viral serology, autoimmune liver panel, and genetic tests (Wilson's, haemochromatosis) for appropriate causes. Liver biopsy for definitive histological diagnosis when needed.

Treatment is directed at the underlying cause. Pre-hepatic haemolytic jaundice: treat the specific cause — immunosuppression for autoimmune haemolytic anaemia (prednisolone, rituximab); hydroxycarbamide for sickle cell; splenectomy for hereditary spherocytosis; antimalarials for malaria. Gilbert's syndrome requires no treatment — reassurance that it is benign. Hepatic jaundice: direct-acting antivirals for hepatitis C (cure 95%+); antivirals (tenofovir, entecavir) for hepatitis B; corticosteroids for autoimmune hepatitis and severe alcoholic hepatitis; N-acetylcysteine for paracetamol overdose (within 24 hours — highly effective if given early); alcohol abstinence for alcoholic hepatitis; and liver transplantation for acute liver failure and end-stage cirrhosis. Cholestatic jaundice: ERCP with stone extraction for choledocholithiasis — urgent if ascending cholangitis is suspected. Biliary stenting for malignant obstruction (provides palliation). Surgery (Whipple's pancreaticoduodenectomy for pancreatic head cancer or cholangiocarcinoma). Ursodeoxycholic acid (UDCA) for PBC (slows progression). Cholestyramine, rifampicin, or naltrexone for cholestatic pruritus. Neonatal jaundice: phototherapy is the primary treatment; exchange transfusion for severe hyperbilirubinaemia (risk of kernicterus/bilirubin encephalopathy).

The complications of jaundice arise from the underlying condition causing bilirubin elevation rather than bilirubin accumulation per se, though very high bilirubin levels contribute to their own toxicity. Untreated biliary obstruction leads to acute cholangitis — bacterial infection ascending obstructed bile ducts causing sepsis with Charcot's triad (fever, rigors, right upper quadrant pain) or Reynold's pentad (adding hypotension and confusion) — a life-threatening emergency requiring urgent ERCP biliary drainage and IV antibiotics; mortality without drainage approaches 100% in suppurative cholangitis. Unresolved obstructive jaundice causes secondary biliary cirrhosis from progressive hepatocyte damage and portal hypertension over months. Cholestasis impairs absorption of fat-soluble vitamins (A, D, E, K) — vitamin K deficiency causes coagulopathy; vitamin D deficiency causes osteoporosis and fractures. Severe intractable pruritus from bile salt skin deposition causes sleep disturbance, skin excoriation, and profound quality-of-life impairment in chronic cholestatic conditions (primary biliary cholangitis, primary sclerosing cholangitis). Kernicterus in neonates — unconjugated bilirubin crossing the blood-brain barrier — causes permanent basal ganglia damage resulting in choreoathetoid cerebral palsy, sensorineural hearing loss, and cognitive impairment; prevented by timely phototherapy with threshold of 430 mcmol/L or exchange transfusion for levels above 510 mcmol/L. Acute liver failure causing jaundice carries 50-80% mortality without liver transplantation.

Viral hepatitis prevention: vaccination against hepatitis A and B; safe sex practices; no sharing of needles; screening blood products. Alcohol abstinence prevents alcoholic liver disease and hepatitis. Avoid unnecessary medications and herbal supplements with hepatotoxic potential. Safe medication disposal and acetaminophen dosing awareness prevents paracetamol-induced hepatotoxicity. Gallstone prevention: maintain healthy weight (obesity is the major risk factor for gallstones); achieve weight loss slowly (rapid weight loss paradoxically increases gallstone risk — consider ursodeoxycholic acid prophylaxis during rapid weight loss programmes). Monitor liver function periodically for patients on hepatotoxic medications (methotrexate, antiepileptics, antituberculosis drugs). Neonatal jaundice: breastfeeding support (poor feeding causes inadequate bilirubin excretion); universal neonatal jaundice screening; serum bilirubin measurement and risk stratification guides phototherapy initiation.

Seek emergency medical care immediately (999/911 or nearest emergency department) for: jaundice with fever and right upper quadrant pain (Charcot's triad — possible ascending cholangitis — a life-threatening biliary emergency requiring immediate antibiotics and biliary drainage); jaundice with confusion or drowsiness (possible hepatic encephalopathy from acute liver failure or decompensated cirrhosis); jaundice with vomiting blood or black tarry stools; or jaundice with severe abdominal pain. See your doctor urgently (within 2 weeks) for any new jaundice in an adult — it requires prompt investigation. Painless progressive jaundice in a patient over 50 with weight loss may indicate pancreatic cancer or cholangiocarcinoma — urgent imaging is essential. Infants with jaundice persisting beyond 14 days (21 days if breast-fed) require urgent evaluation for biliary atresia — early Kasai surgery dramatically improves outcomes.