Pain on the right side of your abdomen, just below the ribs, often points to the liver. But liver tissue itself has no pain receptors. The pain you feel comes from a thin membrane wrapped around the liver called Glisson’s capsule, which is packed with nerve endings that fire when the capsule is stretched, pressed, or inflamed. Anything that causes the liver to swell, grow, or become irritated can trigger this stretching and produce pain ranging from a dull ache to a sharp stab.
Why the Speed of Swelling Matters
The type of pain you feel depends largely on how quickly the liver capsule stretches. When something causes sudden distension, like a new infection or a blood clot, the result is sharp, intense pain that can mimic a gallbladder attack. When the capsule stretches gradually over weeks or months, as with fatty buildup or slow-developing scarring, the sensation is typically a dull, nagging ache or a feeling of fullness and pressure under the right ribs. This is why two people with very different liver problems can describe their pain in completely different ways.
Fatty Liver Disease
The most common cause of chronic right-side liver discomfort is fatty liver disease, now formally called metabolic dysfunction-associated steatotic liver disease (MASLD). Most people with the condition have no symptoms at all. When symptoms do appear, they tend to be vague: fatigue, a general sense of feeling unwell, and pain or discomfort in the upper right belly.
The pain happens because excess fat deposits cause the liver to enlarge. If the condition progresses to its more severe form (metabolic dysfunction-associated steatohepatitis, or MASH), inflammation joins the picture, further swelling the organ and increasing pressure on that sensitive outer capsule. MASLD is closely tied to obesity, insulin resistance, and high cholesterol, so the discomfort often develops alongside those metabolic issues rather than appearing in isolation.
Alcohol-Related Liver Damage
Heavy drinking over an extended period can inflame the liver enough to produce noticeable right-side pain. Alcoholic hepatitis typically develops in women who drink three to four drinks a day for six months or longer, and in men who drink four to five a day over the same timeframe. The most recognizable sign is jaundice, a yellowing of the skin and eyes, but the symptom list also includes belly tenderness, low-grade fever, nausea, loss of appetite, and pain in the upper right abdomen.
As alcohol-related damage advances, complications pile on: fluid accumulation in the abdomen, confusion from toxin buildup the liver can no longer clear, and bleeding from swollen veins in the esophagus or stomach. The pain itself may become less specific and harder to pinpoint as these systemic effects take over.
Viral Hepatitis
Hepatitis B and C are viral infections that inflame the liver and can cause right-side abdominal pain. Acute hepatitis B symptoms appear an average of 90 days after exposure, though the window ranges from 60 to 150 days. Common symptoms during the acute phase include abdominal pain, nausea, vomiting, fatigue, and jaundice. For many people, these symptoms last anywhere from six weeks to six months.
Hepatitis C often flies under the radar for years, slowly damaging the liver without obvious symptoms. When pain does develop, it follows the same pattern: the virus triggers inflammation, the liver swells, and the capsule stretches. Chronic viral hepatitis that goes untreated can eventually lead to scarring and cirrhosis.
Cirrhosis
Cirrhosis is the end stage of long-term liver damage from any cause, whether alcohol, viral hepatitis, fatty liver disease, or autoimmune conditions. Healthy liver tissue is gradually replaced by scar tissue, which distorts the organ’s structure and compresses blood vessels. One of the early symptoms is upper abdominal pain. As the disease progresses, scar tissue squeezes the portal vein (the main blood supply to the liver), raising pressure throughout the system and causing complications like fluid buildup in the abdomen.
By the time cirrhosis is advanced, the pain picture shifts. Abdominal swelling itself becomes uncomfortable, and the complications of portal hypertension, like enlarged veins in the digestive tract, create new sources of discomfort that can overshadow the original right-side ache.
Liver Abscess
A liver abscess is a pocket of pus that forms inside the liver, usually from a bacterial infection. It’s far less common than the conditions above but produces more dramatic symptoms. Pain concentrates in the right upper abdomen and is often accompanied by fever, chills, and night sweats. Some people also feel referred pain in the right shoulder or lower right chest, because the nerves serving the liver capsule and the diaphragm share pathways that the brain can misinterpret. A liver abscess requires prompt treatment and is not something that resolves on its own.
Other Possible Causes
Not all right-side pain under the ribs originates in the liver. The gallbladder sits just beneath the liver and can produce pain that feels identical, especially with gallstones or gallbladder inflammation. Conditions affecting the right kidney, the lower right lung, or even the muscles between the ribs can mimic liver pain. This overlap is one reason imaging (usually an ultrasound) and blood work are important for sorting out the actual source.
Blood tests that measure liver enzymes help determine whether the liver is involved. The two most commonly checked enzymes, ALT and AST, have standard ranges of roughly 7 to 55 and 8 to 48 units per liter, respectively. Elevated levels suggest liver cells are being damaged or destroyed, though they don’t pinpoint the cause on their own. Results can vary slightly between labs and between men and women.
Symptoms That Signal an Emergency
Most liver-related right-side pain develops slowly and warrants a scheduled visit with a doctor, not a trip to the emergency room. But certain combinations of symptoms indicate the liver is failing rapidly and require immediate attention. These include sudden yellowing of the skin or eyes, confusion or personality changes, a swollen abdomen that appears over days rather than weeks, persistent vomiting, and breath that smells musty or unusually sweet. Acute liver failure can develop quickly even in someone who was previously healthy, and early treatment is critical.