Cirrhosis is a condition where healthy liver tissue is gradually replaced by permanent scar tissue, reducing the liver’s ability to function. It develops over years or decades of ongoing liver damage, and by the time symptoms appear, significant scarring has already occurred. The liver is remarkably resilient and can keep working even with substantial damage, which is why cirrhosis often goes undetected in its early stages.
How Scar Tissue Replaces Healthy Liver
Your liver has a built-in repair system. When liver cells are damaged, the organ tries to regenerate by growing new cells to replace the dead ones. But when the damage is chronic, happening over and over again for months or years, this repair process goes wrong.
Repeated injury triggers specialized cells in the liver called stellate cells to activate. Once activated, these cells transform into a different cell type that produces tough, fibrous material. This fibrous material is the scar tissue. Over time, bands of scar tissue build up throughout the liver, blocking normal blood flow and oxygen delivery to liver tissue. The result is a liver that can no longer efficiently filter toxins from the blood, process nutrients, produce bile, or make essential proteins like those needed for blood clotting. Worse, the scarring creates a self-reinforcing cycle: the stiffened liver tissue itself pushes the surrounding cells to produce even more scar tissue, accelerating the damage in later stages.
Common Causes
Three causes account for the vast majority of cirrhosis cases. Long-term heavy alcohol use damages liver cells directly and is one of the leading causes worldwide. Chronic hepatitis B and hepatitis C infections cause ongoing inflammation that, over years, triggers the scarring process. And nonalcoholic fatty liver disease, where fat builds up in the liver typically due to obesity or metabolic conditions, has become an increasingly common path to cirrhosis.
Less frequent causes include autoimmune hepatitis (where the immune system attacks liver cells), bile duct diseases, genetic conditions like hemochromatosis (iron overload) and Wilson’s disease (copper buildup), and prolonged exposure to certain medications or toxins.
Compensated vs. Decompensated Cirrhosis
Cirrhosis progresses through two broad stages that have dramatically different outlooks.
In compensated cirrhosis, the liver is scarred but still functioning well enough to handle its essential jobs. This is the asymptomatic stage. You won’t have fluid buildup in the abdomen, bleeding from swollen veins, confusion from toxin buildup, or yellowing of the skin. Because symptoms and lab results can appear relatively normal, diagnosis at this stage is more challenging and sometimes requires specialized imaging or a biopsy to confirm. The median survival for people with compensated cirrhosis is more than 12 years, and with proper management of the underlying cause, some people remain in this stage indefinitely.
Decompensated cirrhosis is when the liver can no longer keep up. It’s defined by the appearance of one or more major complications: fluid accumulation in the abdomen (ascites), jaundice, bleeding from enlarged veins in the esophagus or stomach, or hepatic encephalopathy (a buildup of toxins that affects brain function, causing confusion and disorientation). At this stage, diagnosis is usually straightforward because the signs are obvious on physical exam and bloodwork. The median survival drops to roughly 2 years, making it a critical turning point in treatment decisions.
Symptoms to Recognize
Early cirrhosis rarely announces itself. When symptoms do emerge, they tend to be vague: fatigue, general weakness, loss of appetite, unexplained weight loss, or nausea. These are easy to attribute to other causes, which is part of why cirrhosis is so often diagnosed late.
As scarring progresses, more distinctive signs appear. Jaundice gives the skin and the whites of the eyes a yellow tint because the liver can no longer process bilirubin, a waste product from old red blood cells. Itchy skin without any visible rash can develop for similar reasons. Small, visible blood vessels that look like spiders may appear on the skin, particularly on the upper body. The abdomen may swell noticeably from fluid retention. Bruising and bleeding happen more easily because the liver isn’t producing enough clotting proteins. In advanced cases, confusion, memory problems, and difficulty concentrating signal that toxins are building up in the bloodstream and reaching the brain.
How Cirrhosis Is Diagnosed
Doctors use a combination of blood tests, imaging, and sometimes biopsy to confirm cirrhosis and gauge its severity.
Blood tests check several markers of liver function. High bilirubin levels suggest the liver is struggling to process waste. Low albumin (a protein made by the liver) indicates reduced production capacity. A test called INR measures how well your blood clots; abnormal results point to the liver falling behind on clotting protein production. Kidney function is also tested, since advanced liver disease frequently affects the kidneys.
Imaging has advanced significantly. Transient elastography and magnetic resonance elastography (MRE) are noninvasive tests that measure how stiff the liver has become. Stiffer tissue means more scarring. These technologies produce color-coded maps that distinguish healthy, flexible liver tissue from heavily fibrosed areas. In many cases, MRE now provides the same diagnostic information that used to require a liver biopsy, with far less discomfort and risk. Biopsy, where a small tissue sample is taken with a needle, is still used when other tests are inconclusive or when the specific cause of liver damage needs to be identified.
Portal Hypertension and Its Complications
One of the most dangerous consequences of cirrhosis is portal hypertension, or increased blood pressure in the vein that carries blood from the digestive organs to the liver. Scar tissue makes the liver stiff and resistant to blood flow, forcing pressure to build up in this vein system. As that pressure rises, blood finds alternate routes, enlarging veins in the esophagus and stomach (called varices) that were never meant to handle that volume. These swollen veins are fragile and can rupture, causing life-threatening bleeding.
Portal hypertension also drives ascites, the accumulation of fluid in the abdominal cavity. This can cause significant abdominal swelling, discomfort, and difficulty breathing. In some cases, fluid crosses into the space around the lungs (hepatic hydrothorax), making breathing even harder. When fluid builds up in the chest, it may need to be drained directly to relieve symptoms and allow the lung to expand.
Treatment and Management
There is no way to reverse the scar tissue that defines cirrhosis, so treatment focuses on two goals: stopping further damage and managing complications.
Stopping further damage means addressing the root cause. For alcohol-related cirrhosis, that means complete abstinence. For hepatitis B or C, antiviral treatment can halt the viral attack on liver cells. For fatty liver disease, weight loss, dietary changes, and managing conditions like diabetes and high cholesterol are central. When the underlying cause is controlled, especially in compensated cirrhosis, the liver can sometimes stabilize and continue functioning for years.
Managing complications becomes the priority once decompensation occurs. Ascites is typically treated with dietary sodium restriction and medications that help the body shed excess fluid. For people hospitalized with ascites, the fluid can be drained directly from the abdomen through a procedure called paracentesis. When ascites keeps returning despite treatment (called refractory ascites), repeated drainage sessions may be needed, guided by how quickly the fluid reaccumulates. Patients with new-onset ascites or those admitted for ascites-related symptoms should have diagnostic fluid testing as soon as possible to rule out infection.
Low sodium levels in the blood are a common and tricky complication. Managing this involves restricting fluid intake to about 1 to 1.5 liters per day, adjusting medications, and monitoring kidney function closely. Severe cases may require hospital treatment with specialized therapies.
For people with advanced, decompensated cirrhosis who aren’t responding to other treatments, liver transplantation becomes the definitive option. Transplant eligibility is determined using scoring systems that factor in lab values like bilirubin, INR, and kidney function to prioritize the sickest patients. Not everyone qualifies, and the wait for a donor organ can be long, which is why early referral to a transplant center matters.
Living With Cirrhosis
A cirrhosis diagnosis doesn’t mean the same thing for everyone. Someone diagnosed in the compensated stage who addresses the underlying cause may live a relatively normal life for well over a decade. Someone diagnosed after decompensation faces a more urgent situation but still has treatment options that can extend and improve quality of life.
Regular monitoring is essential regardless of stage. This includes periodic blood work, imaging to watch for liver cancer (a known risk of cirrhosis, since the ongoing cycle of cell death and regeneration can trigger cancerous growth), and screening for varices so they can be treated before they bleed. Avoiding alcohol entirely, being cautious with over-the-counter medications (many are processed by the liver), and maintaining good nutrition all help protect whatever liver function remains.