What Is Acute Liver Failure?

Acute liver failure happens when the liver suddenly loses its ability to work properly. This condition can develop within days or weeks and is considered a medical emergency. The liver plays an important role in removing toxins, helping blood clot, and supporting digestion, so rapid liver failure can affect many parts of the body.

Unlike chronic liver disease, which develops slowly over time, acute liver failure comes on quickly and needs immediate treatment.

Several conditions and injuries can lead to acute liver failure. Common causes include:

• Acetaminophen overdose
• Reactions to medications or toxins
• Viral hepatitis infections
• Autoimmune liver disease
• Wilson disease and other rare genetic conditions
• Reduced blood flow to the liver

In some people, the exact cause may not be found.

Symptoms

Acute liver failure can begin with symptoms that seem mild at first but may worsen rapidly. Early care is important because complications can become serious in a short amount of time.

Common symptoms may include:

• Fatigue or weakness
• Nausea or vomiting
• Loss of appetite
• Diarrhea
• Pain or discomfort in the upper right abdomen
• Yellowing of the skin or eyes (jaundice)
• Swelling in the abdomen
• Easy bruising or bleeding
• Confusion, trouble concentrating, or extreme sleepiness

How Is It Diagnosed?

Acute liver failure requires urgent evaluation. A healthcare provider will ask about symptoms, medications, alcohol use, and possible exposure to toxins or infections.

Testing often includes blood work to measure liver function and check how well the blood is clotting. Imaging tests such as CT scans or MRI may be used to look at the liver and surrounding organs. Providers may also evaluate memory, alertness, and mental status because liver failure can affect brain function.

In some cases, a liver biopsy may help determine the cause of the damage.

How Is It Treated?

Treatment depends on the cause of the liver failure and how severe the condition is. Most people need care in the hospital so providers can closely monitor symptoms and complications.

Treatment may include:

• Medicines to reduce liver damage
• Activated charcoal or N-acetylcysteine for acetaminophen overdose
• Antiviral medications for hepatitis infections
• Steroids for autoimmune hepatitis
• Fluids, nutrition support, and monitoring for bleeding or infection

Some people recover once the underlying cause is treated. If the liver cannot heal on its own, a liver transplant may be needed. Early diagnosis and treatment can improve the chances of recovery.