Understanding the Causes of Jaundice: A Gastroenterology Guide

Jaundice is a condition where the skin and eyes turn yellow. This happens when there is too much bilirubin in the blood. Bilirubin is a yellow substance made when red blood cells break down. Understanding the causes of jaundice is important because it can signal problems with the liver, blood, or bile ducts. In this guide, we will explain the main causes of jaundice and why jaundice occurs. Knowing the risk factors for jaundice can help you stay informed and seek help if needed.

Liver Diseases

First, liver diseases are a common cause of jaundice. The liver helps remove bilirubin from the body. When the liver is damaged, it cannot do this well. As a result, bilirubin builds up and causes jaundice. Some main liver diseases that lead to jaundice include:

Hepatitis: This is swelling of the liver, often caused by viruses like hepatitis A, B, or C.

Cirrhosis: Scarring of the liver from long-term damage, often due to alcohol or chronic hepatitis.

Fatty liver disease: Fat builds up in the liver, which can harm its function.

Liver cancer: Tumors can block or damage the liver’s ability to process bilirubin.

According to the World Health Organization (WHO), liver diseases are a leading reason why jaundice occurs worldwide.

Hemolysis (Breakdown of Red Blood Cells)

Next, hemolysis means the fast breakdown of red blood cells. When this happens, more bilirubin is made than the liver can handle. Therefore, jaundice can develop. Some causes of hemolysis include:

Sickle cell disease: A genetic blood disorder that causes red blood cells to break easily.

Thalassemia: Another inherited blood problem that leads to fragile red blood cells.

Autoimmune diseases: The body attacks its own red blood cells.

Reactions to blood transfusions: Sometimes, the body destroys new blood cells after a transfusion.

Because hemolysis increases bilirubin quickly, it is a major risk factor for jaundice, especially in newborns and people with blood disorders.

Bile Duct Obstruction

Sometimes, jaundice occurs when the tubes that carry bile from the liver to the gut get blocked. This is called bile duct obstruction. When bile cannot flow, bilirubin builds up in the blood. Common reasons for bile duct blockage include:

Gallstones: Hard stones can block the bile ducts.

Pancreatic cancer: Tumors near the bile duct can press on it.

Bile duct tumors: Growths inside the duct can stop bile flow.

Scarring from surgery or injury: This can narrow the bile ducts.

For adults, bile duct obstruction is one of the main causes of jaundice, according to the Centers for Disease Control and Prevention (CDC).

Genetic Disorders

Some people are born with conditions that affect how their bodies handle bilirubin. These genetic disorders can lead to jaundice, even in newborns. Examples include:

Gilbert’s syndrome: A mild condition where the liver does not process bilirubin well.

Crigler-Najjar syndrome: A rare disorder causing very high bilirubin levels.

Hereditary spherocytosis: A blood disorder that makes red blood cells break down faster.

Although these conditions are rare, they are important risk factors for jaundice in some families.

Infections

Infections can also cause jaundice. For example, some viruses and bacteria can harm the liver or blood cells. As a result, bilirubin levels rise. Common infections linked to jaundice include:

Hepatitis viruses: These attack the liver directly.

Malaria: This disease destroys red blood cells, leading to more bilirubin.

Leptospirosis: A bacterial infection that can damage the liver.

Because infections can spread easily, they are a key reason why jaundice occurs in many parts of the world.

Medication-Induced Causes

Finally, some medicines can cause jaundice as a side effect. These drugs may harm the liver or cause red blood cells to break down. Examples of medication-induced causes include:

Acetaminophen (paracetamol): High doses can damage the liver.

Some antibiotics: These may cause liver problems in rare cases.

Certain cancer drugs: These can affect liver function.

Herbal supplements: Some herbs may be toxic to the liver.

Therefore, always talk to your doctor before starting new medicines or supplements, especially if you have liver problems.

Summary

In summary, the main causes of jaundice include liver diseases, hemolysis, bile duct obstruction, genetic disorders, infections, and certain medicines. Each cause affects how the body handles bilirubin. If you notice signs of jaundice, consult a healthcare professional at Dr. Abhiman Pawar for proper evaluation.