Hepatitis A, B, C and Autoimmune Hepatitis: Causes, Symptoms, Diagnosis, Treatment and Prevention

Hepatitis means inflammation of the liver. The liver is one of the body’s most important organs. It helps digest food, stores energy, processes medicines, removes waste products from the blood, produces proteins, and supports the immune system. When the liver becomes inflamed, these functions may be affected.

Hepatitis can happen for several reasons. Viral infections are among the most common causes. Hepatitis A, hepatitis B, and hepatitis C are caused by different viruses and spread in different ways. Hepatitis A usually causes a short-term infection, while hepatitis B and hepatitis C can sometimes become chronic and gradually damage the liver. Another form, called autoimmune hepatitis, occurs when the immune system mistakenly attacks the liver.

Some people with hepatitis have no symptoms. Others may experience tiredness, nausea, loss of appetite, abdominal discomfort, dark urine, pale stools, fever, joint pain, or yellowing of the eyes and skin. Since symptoms can be mild or absent in the early stages, testing is often important, especially for people with risk factors.

What is Hepatitis?

Hepatitis is inflammation or irritation of the liver. It may be temporary and resolve within weeks, or it may continue for months or years and cause progressive liver damage.

The word “hepatitis” describes inflammation, not one specific disease. The cause may be:

• A viral infection.
• An autoimmune reaction.
• Alcohol-related liver injury.
• Certain medicines or toxins.
• Fat accumulation in the liver.
• Metabolic or inherited conditions.
• Other infections or medical problems.

Acute and chronic hepatitis

Hepatitis can be described as acute or chronic.

• Acute hepatitis begins suddenly and lasts for a limited period. It may cause symptoms such as fever, nausea, jaundice, or abdominal discomfort.
• Chronic hepatitis continues for six months or longer. It may remain silent for years but gradually cause fibrosis, cirrhosis, or other liver complications.
• Hepatitis A usually causes an acute infection and does not normally become chronic.
• Hepatitis B may be acute or chronic.
• Hepatitis C may become chronic if it is not diagnosed and treated.
• Autoimmune hepatitis is usually a chronic disease, although some people may first present with severe acute inflammation.

Types of Hepatitis

Hepatitis A

Hepatitis A is a viral infection caused by the hepatitis A virus. It usually spreads through contaminated food or water, or close contact with an infected person.

It generally causes an acute illness. Most people recover completely and develop long-term immunity after infection. Hepatitis A does not usually cause chronic liver disease, but it can occasionally cause severe liver inflammation, particularly in older adults or people who already have liver disease.

Hepatitis B

Hepatitis B is caused by the hepatitis B virus. It spreads through infected blood and body fluids. It can be transmitted through sexual contact, sharing needles or other injecting equipment, contaminated medical or tattoo equipment, and from an infected mother to her baby during childbirth.

Hepatitis B may be acute or chronic. Some people clear the virus naturally after an acute infection. Others develop chronic hepatitis B, which may require regular monitoring and antiviral treatment.

Hepatitis C

Hepatitis C is caused by the hepatitis C virus. It is mainly spread through contact with infected blood. Sharing needles, syringes, or other injection equipment is a major risk. It may also spread through unsafe medical procedures, inadequately sterilised tattoo or piercing equipment, or blood transfusion when blood screening is not adequate.

Hepatitis C often causes few or no symptoms in the beginning. However, untreated chronic infection can lead to fibrosis, cirrhosis, liver failure, and liver cancer. Modern direct-acting antiviral medicines can cure most people with hepatitis C.

Autoimmune hepatitis

Autoimmune hepatitis is not caused by a virus and is not contagious. It occurs when the immune system mistakenly attacks liver cells, causing ongoing inflammation and damage.

It can affect people of any age but is more common in women and may occur along with other autoimmune conditions. Without treatment, autoimmune hepatitis can progress to fibrosis, cirrhosis, or liver failure. It is usually treated with corticosteroids and other immune-suppressing medicines.

Differences Between Hepatitis A, B, C and Autoimmune Hepatitis

The four conditions differ in their causes, transmission, duration, treatment, and prevention.

• Hepatitis A is usually spread through contaminated food or water.
• Hepatitis B spreads through blood and body fluids.
• Hepatitis C is mainly spread through infected blood.
• Autoimmune hepatitis is caused by an abnormal immune response and cannot spread from person to person.
• Hepatitis A does not usually become chronic.
• Hepatitis B and C can become chronic and may gradually damage the liver.
• Hepatitis A and B can be prevented with vaccination.
• There is currently no vaccine for hepatitis C, but it can often be cured with oral antiviral medicines.
• Autoimmune hepatitis is managed with medicines that suppress or regulate the immune response.

Causes of Hepatitis

Causes of hepatitis A

Hepatitis A commonly develops after consuming the virus through contaminated food or water.

Possible sources include:

• Drinking unsafe water.
• Eating food prepared with contaminated water.
• Eating raw or undercooked shellfish from contaminated water.
• Eating food handled by someone who did not wash their hands.
• Close household contact with an infected person.
• Contact in childcare, schools, or crowded living environments.
• Travel to regions where sanitation is inadequate.

Causes of hepatitis B

Hepatitis B spreads when infected blood or body fluids enter another person’s body.

Possible routes include:

• Transmission from mother to baby during childbirth.
• Sexual contact with an infected person.
• Sharing needles, syringes, or other injecting equipment.
• Unsafe tattooing or piercing.
• Accidental needle-stick injuries.
• Sharing razors, toothbrushes, or items that may contain blood.
• Exposure to unscreened blood or improperly sterilised medical equipment.

Causes of hepatitis C

Hepatitis C is mainly transmitted through infected blood.

Common routes include:

• Sharing needles or syringes.
• Reusing injecting equipment.
• Unsterilised medical or dental equipment.
• Unsafe tattooing or body piercing.
• Sharing razors or other items contaminated with blood.
• Transfusion of unscreened blood.
• Transmission from mother to baby, although this is less common.
• Sexual transmission, which is possible but generally less efficient than blood exposure.

Causes of autoimmune hepatitis

The exact cause of autoimmune hepatitis is not fully understood. It is thought to involve a combination of:

• Genetic susceptibility.
• Environmental triggers.
• Abnormal immune system activity.
• Certain infections or medicines in some patients.
• Other autoimmune diseases.

Risk Factors for Hepatitis

Risk factors for hepatitis A

• Living in or travelling to areas with poor sanitation.
• Eating contaminated food or drinking unsafe water.
• Living with someone who has hepatitis A.
• Working in settings with frequent person-to-person contact.
• Having certain sexual exposures.
• Having chronic liver disease.
• Not being vaccinated.

Risk factors for hepatitis B

• Being born to a mother with hepatitis B.
• Having unprotected sex with an infected person.
• Sharing needles or injecting equipment.
• Working in healthcare with possible blood exposure.
• Receiving medical procedures with inadequately sterilised equipment.
• Having a tattoo or piercing done with unsterile instruments.
• Living in a household with a person who has chronic hepatitis B.
• Having multiple sexual partners.
• Not being vaccinated.

Risk factors for hepatitis C

• Current or past injection drug use.
• Receiving blood transfusion or organ transplantation before reliable screening was introduced.
• Long-term haemodialysis.
• HIV infection.
• Exposure to unsterile medical or cosmetic equipment.
• Birth to a mother with hepatitis C.
• Sharing razors or other blood-contaminated personal items.
• Occupational blood exposure.

Symptoms of Hepatitis

Symptoms vary according to the type of hepatitis, the stage of disease, and the condition of the liver.

Common symptoms

• Tiredness.
• Weakness.
• Loss of appetite.
• Nausea.
• Vomiting.
• Low-grade fever.
• Abdominal discomfort.
• Pain or heaviness in the upper right side of the abdomen.
• Joint pain.
• Headache.
• Dark urine.
• Pale or clay-coloured stools.
• Itching.
• Yellowing of the skin or eyes.
• Unintentional weight loss.

Symptoms of acute hepatitis

Acute hepatitis may cause:

• Sudden fatigue.
• Fever.
• Nausea and vomiting.
• Loss of appetite.
• Abdominal discomfort.
• Muscle or joint pain.
• Dark urine.
• Pale stools.
• Jaundice.
• Generalised itching.

Some people have a mild illness and recover without knowing the exact cause. Others may develop severe inflammation and require hospital care.

Symptoms of chronic hepatitis

Chronic hepatitis may cause no symptoms for many years. When symptoms occur, they may include:

• Persistent tiredness.
• Reduced stamina.
• Poor appetite.
• Mild abdominal discomfort.
• Nausea.
• Itching.
• Joint pain.
• Easy bruising.
• Swelling in the legs or abdomen in advanced disease.
• Confusion or excessive sleepiness in severe liver failure.

Because chronic hepatitis may be silent, people with risk factors should discuss screening with a doctor even if they feel healthy.

Symptoms of autoimmune hepatitis

Autoimmune hepatitis can present in different ways.

• Fatigue.
• Joint pain.
• Nausea.
• Poor appetite.
• Pain over the liver.
• Jaundice.
• Itching.
• Dark urine.
• Enlarged liver.
• Irregular menstrual cycles in some women.
• Symptoms of another autoimmune illness.

Jaundice and Other Warning Signs

Jaundice causes the skin and whites of the eyes to turn yellow. It happens when bilirubin builds up in the blood because the liver is inflamed or cannot process bile normally.

Jaundice may occur with:

• Dark brown urine.
• Pale stools.
• Generalised itching.
• Nausea.
• Weakness.
• Abdominal discomfort.

How is Hepatitis Diagnosed?

Hepatitis is diagnosed using a combination of medical history, physical examination, blood tests, and sometimes imaging or liver biopsy.

A doctor may ask about:

• The timing of symptoms.
• Recent travel.
• Food and water exposure.
• Vaccination history.
• Sexual and blood exposure risks.
• Medicines and supplements.
• Alcohol intake.
• Family history of liver disease.
• Previous surgery, transfusion, dialysis, or medical procedures.
• Other autoimmune conditions.

Physical examination

The doctor may check for:

• Jaundice.
• Enlarged liver or spleen.
• Abdominal tenderness.
• Swelling in the legs.
• Abdominal fluid accumulation.
• Skin changes.
• Bruising.
• Mental status changes.
• Signs of chronic liver disease.

Liver function tests

Blood tests may include:

• ALT and AST, which can rise when liver cells are inflamed.
• Bilirubin, which may increase with jaundice.
• Alkaline phosphatase and gamma-glutamyl transferase.
• Albumin, which reflects the liver’s protein-producing function.
• Prothrombin time or INR, which helps assess blood-clotting function.
• Complete blood count.
• Kidney function and electrolyte tests.

Tests for hepatitis A

Testing may include:

• Hepatitis A IgM antibody for recent or acute infection.
• Hepatitis A IgG antibody for past infection or immunity.

A positive acute antibody test should be interpreted by a doctor along with symptoms and liver test results.

Tests for hepatitis B

Hepatitis B testing may include:

• Hepatitis B surface antigen.
• Hepatitis B surface antibody.
• Total hepatitis B core antibody.
• IgM hepatitis B core antibody.
• Hepatitis B e-antigen and e-antibody in selected cases.
• Hepatitis B viral DNA level.
• Liver function tests.
• Imaging or fibrosis assessment.

Different combinations of hepatitis B markers help determine whether a person is currently infected, has recovered, is immune after vaccination, or has chronic infection.

Tests for hepatitis C

Testing commonly begins with:

• Hepatitis C antibody test.
• Hepatitis C RNA test if the antibody is positive.
• Viral load measurement.
• Genotype testing in selected situations.
• Liver fibrosis assessment.
• Liver function testing.

A positive hepatitis C antibody test does not always mean active infection. It may indicate a previous infection that has cleared or been cured. An RNA test is needed to confirm whether the virus is currently present.

Tests for autoimmune hepatitis

Diagnosis may involve:

• ALT and AST levels.
• Immunoglobulin G levels.
• Antinuclear antibody testing.
• Anti-smooth muscle antibody testing.
• Anti-liver-kidney microsomal antibody testing.
• Anti-soluble liver antigen testing in selected cases.
• Viral hepatitis testing to exclude infection.
• Imaging tests.
• Liver biopsy in many patients.

Treatment for Hepatitis A

There is usually no specific antiviral medicine for hepatitis A. Treatment focuses on supportive care while the body clears the infection.

Supportive treatment may include:

• Adequate rest.
• Sufficient fluids.
• Small, balanced meals.
• Treatment for nausea if prescribed.
• Avoiding alcohol.
• Avoiding unnecessary medicines that may strain the liver.
• Monitoring liver tests when advised.

People with hepatitis A should discuss all medicines, supplements, and herbal products with a doctor before taking them.

Preventing spread at home

• Wash hands carefully after using the toilet.
• Wash hands before preparing or eating food.
• Do not prepare food for others while infectious.
• Clean bathroom and frequently touched surfaces.
• Follow medical advice regarding contact precautions.
• Discuss vaccination or post-exposure protection for close contacts when appropriate.

Treatment for Hepatitis B

Treatment depends on whether the infection is acute or chronic.

Acute hepatitis B

Most adults with mild acute hepatitis B receive supportive care.

• Adequate fluids.
• Nutritious meals.
• Rest.
• Management of nausea or other symptoms.
• Avoidance of alcohol.
• Review of medicines that may affect the liver.
• Follow-up liver tests.

There is generally no routine specific antiviral treatment for uncomplicated acute hepatitis B. Severe acute hepatitis or liver failure requires urgent specialist and hospital care.

Chronic hepatitis B

Chronic hepatitis B requires regular monitoring. Not every patient needs immediate antiviral medicine, but every patient should be evaluated by a liver specialist or qualified physician.

Management may include:

• Hepatitis B viral DNA testing.
• Regular liver function tests.
• Assessment of liver fibrosis.
• Monitoring for cirrhosis.
• Screening for liver cancer when indicated.
• Antiviral treatment for eligible patients.
• Vaccination and testing of household and sexual contacts.
• Avoiding alcohol and unnecessary liver-toxic medicines.

Common long-term antiviral medicines include tenofovir and entecavir. The choice depends on kidney function, pregnancy status, previous treatment, viral activity, liver damage, and other health factors. WHO identifies tenofovir and entecavir as effective long-term treatments for eligible people with chronic hepatitis B.

Antiviral medicines can suppress the virus and reduce the risk of liver damage, but they may not eliminate the virus completely in every patient. Some people need long-term or lifelong treatment and monitoring.

Treatment for Hepatitis C

Hepatitis C can usually be cured with direct-acting antiviral medicines. These medicines are taken orally and directly target the virus.

Hepatitis C treatment may include:

• Confirming active infection with an RNA test.
• Assessing liver fibrosis or cirrhosis.
• Checking kidney function.
• Reviewing other medicines for interactions.
• Prescribing a suitable direct-acting antiviral combination.
• Completing the full course as prescribed.
• Testing after treatment to confirm cure.

Modern hepatitis C treatment has transformed care because many patients can achieve a sustained virological response, meaning the virus is no longer detected after treatment is completed and the appropriate follow-up period has passed. WHO describes direct-acting antiviral treatment as a short-course treatment that has revolutionised hepatitis C care.

Important points about hepatitis C treatment

• A previous hepatitis C infection does not provide reliable immunity against future infection.
• A person can be reinfected after being cured.
• Alcohol should be avoided or strictly limited.
• Patients with cirrhosis may need ongoing liver cancer surveillance even after the virus is cured.
• Household and sexual transmission prevention should be discussed.
• All medicines and supplements should be reviewed before treatment.

Treatment for Autoimmune Hepatitis

Autoimmune hepatitis is treated by reducing the immune system’s attack on the liver.

Common treatment approaches

• Corticosteroids to reduce liver inflammation.
• Immunosuppressive medicines such as azathioprine in selected patients.
• Alternative medicines when first-line treatment is not tolerated.
• Regular liver enzyme and blood count monitoring.
• Monitoring for treatment side effects.
• Long-term maintenance therapy to prevent relapse.

Diet and Lifestyle During Hepatitis

There is no single “hepatitis diet,” but a balanced and liver-friendly lifestyle can support recovery.

Helpful dietary habits

• Eat regular meals.
• Include adequate protein unless a doctor advises otherwise.
• Add vegetables, fruits, whole grains, pulses, and healthy fats.
• Drink sufficient fluids.
• Choose freshly prepared food.
• Reduce highly processed food.
• Limit excess sugar and saturated fat.
• Avoid unverified herbal remedies.
• Avoid fasting or crash diets unless medically supervised.

Alcohol and hepatitis: Alcohol can increase liver inflammation and accelerate liver damage, particularly in people with hepatitis B, hepatitis C, autoimmune hepatitis, or cirrhosis. The safest approach for patients with active liver disease is to avoid alcohol and discuss any uncertainty with a doctor.

Complications of Hepatitis

Untreated or poorly controlled hepatitis can cause complications over time.

• Fibrosis, or early liver scarring.
• Cirrhosis.
• Portal hypertension.
• Abdominal fluid accumulation.
• Enlarged veins in the food pipe or stomach.
• Internal bleeding.
• Liver failure.
• Hepatic encephalopathy, which can cause confusion.
• Liver cancer.

General complications

• Severe fatigue.
• Poor appetite and weight loss.
• Nutritional deficiencies.
• Itching.
• Swelling in the legs.
• Bone health problems.
• Kidney complications.
• Blood-clotting problems.

When Should you See a Doctor?

You should arrange a medical appointment if you have:

• Yellow eyes or skin.
• Dark urine or pale stools.
• Persistent tiredness.
• Unexplained nausea or loss of appetite.
• Abdominal discomfort over the liver.
• Abnormal liver function test results.
• A history of blood exposure.
• A family member with hepatitis B or C.
• A history of unsafe injection, tattoo, piercing, or medical exposure.
• A chronic liver condition.
• A diagnosis of another autoimmune disease.

Why Choose Rama Hospital for Hepatitis Care?

Hepatitis requires more than a single blood test or short-term medicine. Proper care involves identifying the cause, assessing liver damage, choosing the right treatment, monitoring the response, and preventing future complications.

• Evaluation by experienced physicians, gastroenterologists, and hepatology specialists.
• Diagnostic testing for hepatitis A, B, C, and autoimmune hepatitis.
• Liver function testing and viral marker assessment.
• Imaging and fibrosis evaluation when required.
• Access to antiviral treatment for hepatitis B and hepatitis C.
• Management of autoimmune hepatitis with specialist monitoring.
• Support for jaundice, dehydration, acute hepatitis, and advanced liver disease.
• Screening for complications such as cirrhosis and liver cancer.
• Coordinated care with critical care, radiology, nutrition, and transplant services when needed.

Frequently Asked Questions (FAQs)

Can hepatitis be cured?

Hepatitis C can usually be cured with modern oral antiviral medicines. Hepatitis A generally resolves with supportive care, while hepatitis B can often be controlled with long-term treatment. Autoimmune hepatitis can usually be managed, although many patients need ongoing medication.

Is jaundice always caused by hepatitis?

No. Jaundice can also result from gallstones, other liver diseases, blood disorders, or blockage of bile flow. However, new jaundice should always be medically evaluated to identify the cause.

Can a person with hepatitis B live a normal life?

Yes, many people with hepatitis B live healthy and active lives with appropriate monitoring and treatment. Regular follow-up is important because chronic hepatitis B may remain silent while affecting the liver.

Can autoimmune hepatitis spread to family members?

Autoimmune hepatitis is not contagious, so it cannot spread through contact. Family members may have a higher tendency toward autoimmune conditions, but they do not “catch” autoimmune hepatitis from the patient.

Can hepatitis patients eat normal food?

Most patients can eat a balanced, normal diet unless a doctor recommends specific changes. Fresh food, adequate protein, vegetables, fruits, and sufficient fluids are generally helpful. Alcohol and unverified supplements should be avoided.

Can hepatitis cause liver cancer?

Chronic hepatitis B and hepatitis C can increase the risk of liver cancer, especially when cirrhosis is present. Regular monitoring and effective treatment can reduce complications and help detect cancer early.

Can hepatitis be detected without symptoms?

Yes. Hepatitis B, hepatitis C, and autoimmune hepatitis may remain silent for years. Screening and blood tests are important for people with risk factors or unexplained abnormal liver function tests.

Conclusion

Hepatitis is a broad term for inflammation of the liver, but hepatitis A, B, C, and autoimmune hepatitis are different conditions with different causes and treatments. Hepatitis A is usually an acute infection spread through contaminated food or water. Hepatitis B can become chronic and spreads through blood and body fluids. Hepatitis C is mainly blood-borne and can often be cured with oral antiviral medicines. Autoimmune hepatitis is not contagious and occurs when the immune system attacks the liver.

Many people do not have symptoms in the early stages. This makes screening, accurate blood testing, and medical follow-up especially important for people with risk factors. Symptoms such as jaundice, dark urine, persistent fatigue, abdominal discomfort, nausea, pale stools, or unexplained abnormal liver tests should not be ignored.

With early diagnosis and appropriate treatment, many hepatitis-related complications can be prevented. Vaccination can protect against hepatitis A and B, while safe practices can reduce the risk of hepatitis C. Chronic hepatitis B can be monitored and controlled, hepatitis C can often be cured, and autoimmune hepatitis can usually be managed with long-term specialist care.