Fatty liver often has no symptoms at all, especially in its early stages. Most people discover it incidentally during blood work or an imaging scan done for another reason. When symptoms do appear, they tend to be vague and easy to dismiss: fatigue, a general feeling of being unwell, or mild discomfort under the right side of your rib cage. The condition progresses silently, which is exactly what makes it worth understanding.
You may see the term MASLD (metabolic dysfunction-associated steatotic liver disease) in newer medical resources. It replaced the older name NAFLD in 2023 to better reflect the metabolic factors driving the disease. The symptoms and progression are the same regardless of which term your doctor uses.
Why Most People Feel Nothing at First
The liver itself has very few pain-sensing nerve endings inside it. Fat can accumulate in liver cells for years without triggering any sensation or obvious sign. This is why fatty liver is sometimes called a “silent” condition. Roughly 80% of people with early-stage fat buildup have completely normal energy levels and no belly pain.
When early symptoms do show up, they’re nonspecific. Persistent tiredness that doesn’t improve with sleep is the most commonly reported complaint. Some people notice a vague sense of malaise, a low-grade feeling of being off that’s hard to pin down. These overlap with dozens of other conditions, so they rarely point someone toward a liver problem on their own.
Abdominal Discomfort and Fullness
As fat continues to build up, the liver can swell and stretch the thin membrane (called a capsule) that wraps around it. That capsule does have nerve endings, and the stretching can produce a dull ache or sense of fullness in the upper right side of your abdomen, just below the ribs. Some people describe it as a heavy or dragging sensation rather than sharp pain. It may feel worse when you bend over, press on the area, or move suddenly.
True liver pain is rare in early fatty liver. If you feel a persistent or worsening ache in that spot, it typically means the liver has enlarged enough to put pressure on surrounding tissues.
Skin Changes That Can Signal Liver Trouble
Your skin can reflect what’s happening inside your liver, sometimes before other symptoms develop. Spider veins, small clusters of visible blood vessels that branch outward like a web, may appear on your face, neck, upper chest, or arms. A few spider veins are common and harmless, but having many of them can point to more advanced liver damage.
Itching is another skin-related symptom. When the liver struggles to process bile properly, bile components can build up in the bloodstream and irritate nerve endings in the skin. This itching tends to be widespread rather than localized to one spot, and it often doesn’t come with a visible rash.
In children specifically, a dark, thick, velvety patch of skin on the neck, armpits, or skin folds (called acanthosis nigricans) can be an indirect warning sign. It signals insulin resistance, which is one of the main metabolic drivers behind fatty liver in kids and teens.
Blood Test Clues
Fatty liver is frequently caught through routine blood work rather than symptoms. Two liver enzymes, ALT and AST, are the standard markers. Normal ALT ranges from 7 to 55 units per liter, and normal AST falls between 8 and 48. When liver cells are inflamed or damaged, they release these enzymes into the bloodstream, pushing levels above those ranges. Mildly elevated numbers don’t always mean fatty liver, but they’re often the first clue that prompts further testing with an ultrasound or other imaging.
It’s worth noting that liver enzymes can remain completely normal even when significant fat is present. Normal blood work does not rule out fatty liver on its own.
The Metabolic Picture Around It
Fatty liver rarely exists in isolation. Doctors now diagnose MASLD when liver fat is present alongside at least one cardiometabolic risk factor: a BMI of 25 or higher (23 in Asian populations), elevated fasting blood sugar (100 mg/dL or above), blood pressure at or above 130/85, triglycerides at or above 150 mg/dL, or low HDL cholesterol (below 40 mg/dL for men, below 50 for women). Most people with fatty liver meet several of these criteria at once.
This means symptoms of the metabolic conditions surrounding fatty liver, such as increased thirst and urination from high blood sugar, or headaches from elevated blood pressure, can sometimes be the first things you notice, even though they aren’t liver symptoms per se.
Symptoms That Mean the Liver Is Scarring
If fatty liver progresses to significant scarring (fibrosis and eventually cirrhosis), the symptom picture changes dramatically. At this stage, the liver can no longer compensate for the damage, and new, more serious symptoms emerge:
- Jaundice: yellowing of the whites of your eyes and skin, caused by a buildup of bilirubin the liver can no longer clear
- Abdominal swelling (ascites): fluid accumulates in the belly as pressure builds in the veins flowing through the liver
- Easy bruising and bleeding: the liver produces clotting factors, and a damaged liver makes fewer of them
- Gastrointestinal bleeding: increased pressure in blood vessels around the stomach and esophagus can cause them to rupture
When jaundice, ascites, bleeding, or brain changes develop, the condition is classified as decompensated cirrhosis, meaning the liver has lost enough function that the body can no longer work around the damage. This stage is a medical emergency.
Confusion and Cognitive Changes
One of the more alarming symptoms of advanced liver disease is a set of cognitive changes that happen when the liver can no longer filter toxins, particularly ammonia, from the blood. These toxins reach the brain and cause a range of mental symptoms: trouble focusing, memory lapses, personality or mood shifts, slurred speech, and flipping between daytime sleepiness and nighttime insomnia.
These changes exist on a spectrum. In mild cases (sometimes called covert encephalopathy), the person may not even realize anything is wrong, though family members might notice subtle differences in behavior or sharpness. In severe cases, confusion can progress to disorientation, a characteristic flapping tremor of the hands, and eventually coma. This only occurs in advanced disease, not in early fatty liver, but it underscores why catching the condition early matters.
How Symptoms Change by Stage
The clearest way to think about fatty liver symptoms is as a timeline. In stage one, simple fat accumulation, you’ll likely feel nothing. In stage two, inflammation begins (now called MASH, formerly NASH), and you might start noticing fatigue, general malaise, or that dull right-sided ache. In stage three, fibrosis, symptoms often remain subtle but may include more persistent fatigue and skin changes like spider veins or itching. Stage four, cirrhosis, is where the serious symptoms cluster: jaundice, fluid buildup, bleeding, and cognitive changes.
The transition from one stage to the next can take years or even decades, and not everyone progresses. Roughly 20% of people with simple fatty liver develop the inflammatory form, and a smaller fraction of those go on to cirrhosis. Weight loss of even 5 to 10% of body weight has been shown to reduce liver fat significantly and can halt or reverse progression in early stages.