The short answer
Pancreatic cancer often causes no symptoms until it has grown. Possible signs include jaundice (yellowing of the skin and eyes), belly or back pain, unexplained weight loss, and new diabetes. These have many other causes.
Pancreatic cancer often causes no symptoms until it has grown.
Jaundice — yellowing of the skin and eyes — can be an early sign.
Belly pain that spreads to the back, and unexplained weight loss, are common.
New-onset diabetes or digestive changes can occur.
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The full explanation.
The simple version
The pancreas sits deep in the belly, behind the stomach. Because of this, pancreatic cancer often causes no symptoms until it has grown. When symptoms do appear, jaundice and belly or back pain are among the more common ones.
Possible signs
Symptoms can include:
- Jaundice — yellowing of the skin and the whites of the eyes
- Dark urine and light-colored stools, which often go along with jaundice
- Pain in the upper belly that may spread to the back
- Unexplained weight loss and loss of appetite
- Nausea or digestive changes
- New-onset diabetes
No single symptom points clearly to pancreatic cancer on its own. It is the combination, or symptoms that persist and worsen, that matters most.
Jaundice and new upper-belly or back pain should be checked promptly.
Why jaundice happens
Jaundice can occur when a tumor in the head of the pancreas presses on the bile duct. This is the tube that carries bile from the liver to the intestine. It can also block the duct outright. When bile cannot flow normally, a pigment called bilirubin builds up in the blood. This turns the skin and eyes yellow. It darkens the urine and lightens the stool. Jaundice has other causes too, including gallstones and liver disease. But it always deserves prompt evaluation.
Why it is often found late
Early pancreatic cancer usually causes no symptoms. The pancreas is also hard to examine directly. Because of this, the cancer is often found only after it has grown enough to press on nearby structures or spread. This is one of the central challenges of pancreatic cancer. It is why new or lasting symptoms deserve prompt attention, especially in someone with risk factors. Do not wait to see if they pass.
New diabetes deserves attention
New diabetes that appears suddenly is worth mentioning to a doctor, along with any other symptoms. This is especially true in someone older with no family history of diabetes. In some cases, it turns out to be an early sign of pancreatic cancer rather than a cause of it. Most new diabetes has nothing to do with pancreatic cancer. But the connection is real enough that doctors take note of the pattern.
When to see a doctor
See a doctor for jaundice, ongoing upper belly or back pain, unexplained weight loss, or new diabetes. These symptoms have many other, more common causes. But they should always be evaluated rather than assumed to be minor.
What to ask your team
Ask what could be causing your symptoms. Ask whether jaundice could be from something other than cancer. Ask what tests would help find the cause. Ask whether your personal or family history raises your risk.
Digestive symptoms and enzyme changes
The pancreas makes enzymes that help digest fat and protein. A tumor that blocks the duct carrying these enzymes into the intestine can cause pale, greasy, foul-smelling stools that are hard to flush, along with poor absorption of nutrients. This symptom is less well known than jaundice or pain, but it is a real clue doctors watch for, especially combined with unexplained weight loss.
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Common questions
What are the symptoms?
Possible signs include jaundice (yellow skin and eyes), pain in the upper belly or back, unexplained weight loss, loss of appetite, nausea, light-colored stools, dark urine, and sometimes new diabetes.
Why is it often found late?
The pancreas sits deep in the belly, and early pancreatic cancer usually causes no symptoms. Symptoms often appear only once the cancer has grown or spread.
What is jaundice?
Jaundice is a yellowing of the skin and the whites of the eyes, often with dark urine and light stools. It can happen when a tumor blocks the bile duct, and it should be checked promptly.
When should I see a doctor?
See a doctor for jaundice, ongoing upper belly or back pain, unexplained weight loss, or new diabetes, especially if you have risk factors.
Questions to ask your doctor
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Last updated: 2026-08-05Next planned review: 2027-07-07
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How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes. We do not employ clinicians and do not intend to — our work is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source checked — This page was written with AI assistance and checked line by line against the sources listed on it. That confirms the sources support what the page says. It is not a medical review, and it does not confirm the page is complete or right for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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