Autoimmune Hepatitis in Singapore: When the Immune System Hits the Liver

Written & reviewed by the BestDoctors.sg editorial team · Last updated 24 Aug 2026 · General information, not medical advice

A common reassurance patients need: AIH is not contagious and is unrelated to hepatitis B/C viruses or to alcohol – it’s driven by your own immune system.

What autoimmune hepatitis is

The liver filters the blood, processes nutrients and helps clear toxins. In AIH, the immune system – which normally attacks germs – mistakenly targets healthy liver cells, causing persistent inflammation. If unchecked over years, this can lead to fibrosis and then cirrhosis (permanent scarring), and in a minority, liver failure. AIH is not caused by a virus, not caused by alcohol, and not something you can catch or pass on. The exact trigger is unknown and thought to involve genetic susceptibility plus an environmental trigger. There are two types – type 1 (the common adult form) and type 2 (rarer, usually starting in childhood) – distinguished mainly by the pattern of autoantibodies in the blood.

Who gets it

AIH is uncommon but not rare. It affects far more women than men, and can begin at any age, from young children to older adults. Because it clusters with other autoimmune diseases, people who already have (or have a family history of) conditions such as autoimmune thyroid disease, coeliac disease, type 1 diabetes or rheumatoid arthritis carry a somewhat higher chance of developing it. Having one autoimmune condition is a recognised risk marker for others.

Symptoms – often quiet, sometimes sudden

One of the most important things to understand is that early symptoms are frequently vague or absent. The commonest early symptom is fatigue. Others include aching joints, nausea, vague abdominal discomfort, poor appetite and generally feeling unwell. Because these are so non-specific, many people are picked up incidentally when routine blood tests show abnormal liver function. At the other extreme, some present acutely with a more sudden, hepatitis-like illness. If the disease is more advanced, signs of liver damage appear: jaundice (yellowing of the skin and eyes), dark urine, itching, pale stools, easy bruising and fluid swelling. Jaundice and dark urine always warrant prompt assessment.

How it is diagnosed

There is no single test; diagnosis pieces several strands together. Blood tests typically show raised liver enzymes (ALT/AST). Doctors then look for autoantibodies such as ANA and anti-smooth muscle antibody (more typical of type 1) and anti-LKM-1 (more typical of type 2), plus a raised IgG. Just as important is excluding other causes – viral hepatitis, alcohol-related and fatty liver disease, drug causes and other conditions. In most cases a liver biopsy (a tiny sample, usually with a needle under local anaesthetic) confirms the diagnosis, shows the characteristic pattern of inflammation, and assesses how much scarring is already present – information that guides treatment.

Treatment – calming the immune system

AIH usually responds well to treatment, which suppresses the overactive immune response and reduces inflammation. The standard approach is a corticosteroid – most commonly prednisolone – often started at a higher dose to bring inflammation under control (induction), then gradually reduced. A second medicine, usually azathioprine, is typically added to allow the steroid dose to be lowered and to keep the disease in check (maintenance). Treatment is usually long-term, and for many people effectively lifelong, because relapse is common if medicines are stopped. Any attempt to withdraw treatment is only considered after prolonged stable remission, under specialist supervision. Regular blood tests monitor the liver’s response and check for side effects. In advanced disease, the focus also includes managing cirrhosis; in the small number whose disease can’t be controlled or who develop liver failure, a liver transplant may be needed, with generally good outcomes.

Living well with AIH

Because AIH is usually kept in check (rather than cured) by medication, taking your medicines consistently and attending monitoring blood tests are the foundation of staying well – stopping treatment on your own is the commonest reason for relapse. Your doctor may recommend vaccination against hepatitis A and B to protect an already-vulnerable liver, and avoiding alcohol to reduce additional stress. Discuss any new medicines, supplements or over-the-counter painkillers with your doctor, and mention pregnancy plans. The overall picture is hopeful: with treatment and monitoring, most people achieve good disease control and a near-normal life expectancy.

When to see a doctor

See a doctor if you have persistent, unexplained fatigue, or symptoms such as ongoing nausea, joint aches or poor appetite that don’t settle. Seek prompt attention for jaundice, dark urine, pale stools or intense itching. If a routine blood test has shown abnormal liver results, don’t ignore it – ask whether it needs further investigation. A liver specialist (hepatologist) or specialist team manages AIH.

Related autoimmune & rheumatology topics

• Autoimmune disease (overview)
• Scleroderma
• Lupus nephritis
• Antiphospholipid syndrome
• Polymyositis & dermatomyositis
• Juvenile idiopathic arthritis
• Pseudogout (CPPD)
• Joint hypermobility
• Behcet’s disease
• Lupus (SLE)
• Rheumatoid arthritis
• Rheumatologists in Singapore
• Abnormal Liver Function Tests (Raised Liver Enzymes): What They Mean (Singapore)

Sources

• British Liver Trust / Liver UK — autoimmune hepatitis: female predominance, cirrhosis-at-diagnosis, associated conditions (figures attributed, vary).
• Cleveland Clinic — types 1/2, autoantibodies (ANA/SMA/anti-LKM-1), IgG, biopsy, treatment and survival.
• Mayo Clinic — symptoms, causes, complications and associated autoimmune conditions.
• NHS / peer-reviewed guidance — prednisolone + azathioprine, induction/maintenance, high relapse after withdrawal.