Unexplained shoulder pain, especially on the right side, can sometimes be more than a strained muscle — doctors say it can be referred pain from the liver, and in rare cases it has been tied to hepatocellular carcinoma. This article explains how referred pain works, why liver tumors can be felt in the shoulder, which warning signs to watch for, and when to seek medical evaluation. I’ll walk through the typical orthopedic patterns, the differences that suggest an internal cause, and practical advice for people with liver disease or risk factors.
Most shoulder pain comes from common problems like rotator cuff strains, arthritis, overuse, or poor posture, and those issues typically follow a clear pattern after an injury or repetitive motion. That kind of pain usually worsens with certain arm movements, feels tender or stiff, and may limit strength or range of motion. When the shoulder behaves like an orthopedic problem, imaging and targeted treatment tend to resolve it.
But pain can be “referred,” meaning the brain misreads signals from another organ as shoulder pain. Published case reports have shown that shoulder pain can be a symptom of hepatocellular carcinoma, the most common type of primary liver cancer. The right shoulder blade has been linked to early signs of liver disease, which makes this an important clue when no shoulder injury explains the discomfort.
Mark Ashamalla, MD, chief of radiation oncology at Episcopal Health Services in New York, confirmed that liver cancer can sometimes cause pain that is felt in the right shoulder, even though the shoulder itself is completely normal. “The liver sits high in the right upper abdomen, just under the diaphragm, which is the muscle that helps us breathe,” he told Fox News Digital. “If a liver tumor grows large enough or is positioned in a way that stretches the liver’s outer covering or irritates the diaphragm, it can trigger nerves in that area.”
The brain can then misinterpret those signals and “feel” the pain in the right shoulder or right shoulder blade, even though the problem lies in the liver. “It’s a real symptom, but it is not because anything is wrong with the shoulder joint itself,” Ashamalla noted. This is different from phantom pain, which typically follows amputation or loss of a limb.
“Most shoulder pain is caused by far more ordinary things, like muscle strain, arthritis, tendon problems or poor posture,” Ashamalla said. Typical orthopedic discomfort tends to follow a clear course: onset after a precipitating event, worsening with particular movements, and improvement with rest or standard treatments for musculoskeletal injury. By contrast, referred pain from the liver often does not behave like a shoulder problem and can feel out of place.
The doctor warned that there is no single pain pattern that proves cancer. “That said, these are warning signs, not proof. There’s no single pain pattern that automatically means cancer,” Ashamalla emphasized. “What matters most is when the pain does not fit the usual orthopedic pattern or is accompanied by other concerning symptoms.”
Liver cancer can be stealthy, often producing few or vague early symptoms. “Liver cancer often does not present with one obvious, dramatic symptom,” he said. “Instead, it may show up as a cluster of vague changes that are easy to brush off one by one.” Because of that, persistent unexplained pain deserves attention, particularly in people with risk factors like cirrhosis or chronic hepatitis.
“Shoulder pain is extremely common, and in most cases the cause is benign,” he said. “Don’t panic about ordinary shoulder pain, but don’t ignore it if it’s persistent, unexplained, or comes with other red-flag symptoms.” If your pain is ongoing, doesn’t match typical orthopedic signs, or appears alongside fatigue, weight loss, jaundice, abdominal swelling, or other unexplained changes, seek medical evaluation to rule out internal causes and get appropriate testing.
